Where can I get office design and fit-out services in the City of London?

Screen the premises before you shortlist a fit-out route

The first decision is not which provider to contact. It is what kind of intervention the premises and the workplace brief appear to require. A limited refurbishment, a CAT A or CAT B fit-out, a design-and-build appointment, an independent project-management arrangement and a broader turnkey package place different responsibilities on the parties involved.

This is a scope-triage exercise: identify the smallest work package that could meet the intended use, then record the building information that might make a larger package necessary. Fit-out levels do not have universal industry definitions, so a label alone is not a sufficient brief. A provider should translate the label into specific work, exclusions, assumptions and approvals.

The premises screen should contain the lease, landlord fit-out guidelines, any available CDM pre-construction information, condition and ceiling-void surveys, and an order-of-magnitude budget and programme. It should also state the intended workplace use, the information that remains unavailable and the questions that could change the work package. Test whether the existing condition supports the proposed layout and whether the building services can support the intended workplace requirements.

Approval questions belong in this first screen rather than at the end of the process. Building Regulations approval is needed for most alterations to and refurbishment of existing buildings. A Licence to Alter is separate from planning permission and Building Regulations approval, and may be needed for alterations identified by the lease or landlord. The exact requirement depends on the proposed work, so contact a qualified professional or the responsible authority promptly where compliance, safety, structural or contractual questions arise.

The two basic procurement approaches are office design and build and traditional procurement. They should not be selected in isolation from the premises screen. A design-and-build response may be relevant when one coordinated appointment is expected to carry design and construction responsibilities; traditional procurement may separate those responsibilities and require clearer coordination between parties.

Flux HQ helps clients secure office space in the City of London by guiding them through finding and negotiating leases. That makes lease information relevant to the fit-out discussion, but it does not remove the need to assess the building, the scope or the responsibilities of any appointed provider. The useful output at this stage is a premises screen with a provisional work-package choice and a list of unresolved matters that each route must address.

Use the approval path to narrow the provider brief

Use the premises screen to identify which responsibility remains unresolved. The route is less important than making the handoff visible: who interprets the brief, who checks the building, who develops the design, who coordinates delivery, who handles landlord interfaces and who remains responsible at handover.

Flux HQ supports office design and build in London, delivering customised office fit-outs and ongoing management. Flux HQ also provides office design, fit-out and management services, including fit-out and project management, facilities management and events planning. Treat ongoing management as a separate scope from project delivery, and ask for a written boundary between office sourcing, lease support, design, construction and ongoing management.

Independent project management should be tested rather than assumed. Facilitate describes an independent project manager as working in the client’s interest without a commercial relationship with the design team, contractor or landlord. Ask each proposed manager to state its actual authority, reporting arrangements and relationships for the project.

Do not treat a route label as evidence that the premises screen has been resolved. For every route, record the open questions about surveys, building services, landlord requirements, approvals, procurement, construction, snagging and handover. A route has a clear role only when another named party is assigned to every item it does not own.

Build the workplace brief around actual use

Your workplace brief should describe how the office will operate, not simply state how many desks you want. Office space planning starts by establishing the headcount, required spaces and how employees will move between them. That gives a design team something operational to test rather than a headline capacity target to fill.

Record the following before asking for a layout:

• Current headcount and the people who need a regular workstation.
• Expected hiring and team growth over the next two to five years.
• Typical and peak attendance by team or day.
• Meeting types, approximate frequency and the level of privacy required.
• Quiet work, collaborative work, reception, storage and support activities.
• Whether kitchen, breakout and other shared facilities are within your premises or elsewhere in the building.
• Your intended occupation date and any fixed business commitments.

A three-day hybrid schedule requires different desk capacity from a fully office-based workforce. Do not translate hybrid working into a simple desk percentage without explaining attendance peaks, team patterns and the need for rooms. A lower desk count may still require sufficient meeting, collaboration and focus space when people attend together.

Growth planning also belongs in the first brief. Map expected team growth over the next two to five years so the space does not quickly feel cramped. State which growth is a firm plan and which is a scenario. Providers can then show whether the proposed layout has a practical expansion path, rather than quietly pricing a space that works only on the day you move in.

Use the balance between collaboration and quiet concentration to guide space allocation. Describe the activities that need acoustic privacy, the work that benefits from interaction and the occasions when teams need to gather. Your brief should allow a provider to explain the trade-off between fixed desks, shared settings, meeting rooms and adaptable areas.

Experience should be relevant to the project, not merely impressive in the abstract. Active Workplace Group says it has delivered office fit-outs and commercial design-and-build projects across London for over 25 years. That is an attributed experience statement, not a conclusion that the firm is suitable for your project. Ask every provider for examples comparable in scale, building condition, occupation status and complexity.

Your own scope and building will determine whether it has any useful relevance.

Convert the brief into a space and facilities schedule

A facilities schedule turns your workplace brief into items that each provider must address. Office layout and space planning should form the foundation of the fit-out specification. List the capacity, purpose and quality required for each setting instead of leaving the design team to infer what your organisation needs.

Include these headings in the schedule:

• Workstations: expected regular users, shared-desk assumptions, storage and equipment.
• Meeting rooms: room sizes or uses, privacy, video-conferencing and expected peak demand.
• Breakout and collaboration: informal meetings, team sessions, social use and quiet alternatives.
• Kitchen and refreshment areas: required facilities, seating and likely periods of peak use.
• WCs, reception and visitor movement: operational requirements and any constraints already known.
• Storage, print, server or technical areas: equipment, access and security requirements.
• Circulation and accessibility: how people, visitors, furniture and materials will move through the premises.
• Growth and change: areas that could be reconfigured as the team or working pattern changes.

Establish how many people the workplace needs to accommodate, which spaces employees need and how they will move between them before finalising the layout. The schedule should therefore describe relationships as well as quantities. A meeting room near a reception may serve visitors differently from a room beside a team neighbourhood; the provider should explain the proposed arrangement against your use case.

A serviced-office comparison gives one useful capacity illustration. At 45 to 50 sq ft per workstation, ten desks need roughly 450 to 500 sq ft of private office when meeting rooms, kitchen and breakout space are shared with the building. On your own leased floor, where those facilities must fit inside the premises, the same ten people need roughly double the area. These figures are planning illustrations with different facility assumptions, not a universal allocation standard.

Ask providers to return the schedule with their proposal. Require them to identify which requirements are met, which are provisional and which require a building survey or landlord decision. This makes a smaller proposal visible as a scope choice rather than allowing missing rooms or facilities to appear later as a variation.

Experience should also match the type of workplace you are planning. K2 Space states that it has carried out London fit-outs ranging from boutique private-equity suites in Mayfair to 50,000 sq ft headquarters in the City, with one team and one contract covering design through to handover. The statement is the provider’s own description. Use comparable project size, building context and delivery responsibility as your assessment criteria, rather than treating a range of examples as proof of suitability.

Test the proposed route against the building

The proposed delivery route must be tested against the actual premises before the design becomes fixed. A workplace brief can describe the intended use, but the building determines what may be practical, what needs investigation and which party must obtain approval.

Put these inputs in the same project record. A provider should be able to state which information it has received, which assumptions it is making and which surveys remain outstanding.

Ask the design team to test two separate questions:

1. Does the existing condition support the proposed layout and specification?
2. Can the building services support the intended workplace requirements?

Those questions can change the route as well as the design. A layout may fit on a plan but require work to mechanical, electrical, ventilation, data or other building services. A space that appears ready for occupation may still need investigation of ceilings, access, fire strategy, landlord standards or the condition of retained elements. Keep each issue assigned to a named decision-maker.

Landlord requirements and the information available about the premises can affect the works before design decisions are fixed. Request the relevant documents early and ask the provider to list their effect on cost, programme, specification and procurement. Do not accept a proposal that treats landlord information as a late-stage administrative detail when it could alter the design.

Office size, building age, access and occupation influence how fit-out work is carried out and how trades, materials and work areas are managed. An occupied building may require a different access and phasing plan from a vacant floor. A constrained delivery route may affect working hours, storage, lifts and material movement. Ask for these assumptions in the proposal so you can compare two routes on the same basis.

The practical gate is simple: do not select a delivery route solely from a concept image or headline fee. Select it after the provider has identified the building information needed to confirm whether the concept can be delivered, who will obtain it and what happens if the findings change the scope.

Define the work package against the building

Turn the premises screen into a scope schedule. The schedule should show which parts of the proposed workplace are design questions, which are physical works, which depend on the existing building and which require landlord or qualified professional input.

Office fit-out can cover room planning, flooring, electricals, decoration and branding, HVAC, staircases, health and safety, and amenities such as water and telecoms. Record each item as included, excluded, provisional or assigned to another party. Add the relevant building assumption, such as existing services capacity, access, occupation or landlord restriction, so a headline scope does not conceal an unresolved interface.

Fit-out labels should not replace a work package. There are no universal industry definitions for every fit-out level, but most office projects sit within shell and core, CAT A, CAT A+ or CAT B. Ask the provider to translate the selected label into practical items, including partitions, finishes, furniture, technical services, branding and specialist rooms where relevant.

The schedule should also identify the approval path. Note which alterations may require landlord consent, which Building Regulations questions need checking and who will obtain the information or approvals needed before works begin. If the premises screen shows structural, services, heritage, safety or contractual uncertainty, keep that item open until the relevant qualified professional or responsible authority has provided guidance.

Finish the schedule at handover rather than stopping at construction. After construction and installation, the workspace can be reviewed, snagged where necessary and prepared for final handover. Record who identifies defects, who closes them, what completion information is supplied and who remains responsible for unresolved items. This scope schedule becomes the common baseline against which different delivery routes can respond.

Compare proposals after the scope passes the screen

Compare proposals as responses to the premises screen, not as isolated prices. Office fit-out projects typically move through briefing and feasibility, design development, landlord approval and procurement. A proposal should show what information it uses at each stage, which decisions remain open and what changes if a survey, landlord response or approval alters the design.

Use four tests for each response:

1. Premises test: Does the proposal acknowledge the lease, landlord information, condition, services capacity, access and occupation constraints that could affect the works?
2. Scope test: Does it answer the scope schedule item by item, including exclusions, provisional items, technical services, furniture, finishes and handover?
3. Commercial and programme test: Does it state the assumptions behind the indicative cost and programme, rather than presenting an unqualified figure or date?

Assess a fit-out company against your goals and requirements, its London track record, relevant certifications and experience with projects of similar scale and complexity. Office size, building age, access and occupation should form part of that assessment because they affect how the work is carried out.

GXI says it reads the lease and the landlord’s Cat A specification before recommending a route because the answer usually sits in those documents rather than in a sales conversation. Treat that as a useful comparison question: ask whether each proposal has been prepared against the actual lease and landlord information. GXI also says it may recommend a light refurbishment where that solves the problem, or a full Cat B fit-out on a new floor where that is the better investment. Ask each provider to explain why its proposed scope is necessary and what a narrower alternative would leave unresolved.

These are indicative planning figures. Space size, building condition, location, scope, specification, finish and complexity can change the cost, so record the basis of every figure before comparing it.

A UK planning guide places many fit-outs at 8 to 20 weeks from first meeting to move-in once design, approvals and procurement are included, with 6 to 14 weeks on site. Larger or more complex projects with structural work can take 3 to 6 months. Treat these as planning ranges and require each proposal to identify dependencies, approvals, procurement stages and handover activities rather than promising a date before the scope is defined.

A response that leaves a premises, scope, approval or commercial assumption blank has not completed the comparison. Record the gap, assign an owner and seek the necessary information before committing funds or signing an agreement.

Create a cost comparison that exposes the assumptions

An office fit-out budget becomes useful only when you can see what it includes. London office fit-out costs vary with office size, building condition, design specification and overall project complexity. A separate cost source identifies space size, scope of work and chosen specification as cost drivers and says every project is different.

Build your comparison around a common cost basis. Ask each provider to state:

• The area measured, the basis of measurement and the premises included.
• The work packages included in the headline figure.
• The specification and finish assumed for each package.
• Furniture, technology, specialist equipment and professional fees included or excluded.
• Surveys, design changes, landlord charges, approvals, contingency and taxes.
• Building-services work, connections, testing and commissioning.
• Items treated as provisional sums or allowances.
• The assumptions about access, working hours, occupation and programme.
• The point at which the figure becomes a quotation, if it can become one.

These broad UK ranges are not a confirmed City of London price for your building; actual cost varies with scope, size, condition, specification, location, finish and complexity.

Ask your provider to show the technical assumptions behind its own allowance rather than treating the percentage as a specification.

A cost estimator may help you plan the next conversation, but it does not replace a project-specific proposal. The cited provider says its estimator provides an indicative budget to help plan next steps. Keep the word indicative on your internal comparison until scope, surveys, approvals and procurement assumptions have been tested.

Compare totals only after normalising the assumptions. If one proposal includes design, furniture and services coordination while another prices construction only, the lower number is not a lower cost for the same outcome. Record the missing work, assign its likely owner and ask for a revised comparison before presenting the options for approval.

Build a programme from decisions, approvals and delivery

Your programme should show when decisions, surveys, approvals and procurement happen, not only how long construction takes. Depending on the specification, a fit-out can take anywhere from a few weeks to well over a year when structural elements are included. That range is too broad to set a project-specific completion date, but it is a useful warning against choosing a date before defining the scope.

One London project framework provides a staged planning example:

• Briefing and feasibility is shown as Weeks 1–4, covering headcount, space ratios, specification, programme, surveys, landlord information and an order-of-magnitude budget.
• Design development is shown as Weeks 4–12, including the design team, schematic and detailed design, services coordination and CDM Principal Designer arrangements.
• Landlord approval is shown as Weeks 10–16, with written Licence to Alter obtained before works commence.

They may overlap, but overlap should be explicit. Ask which activities can proceed in parallel, which decisions hold up the next stage and what information is required to release each activity.

A separate 2026 UK timeline guide says most office fit-outs take between 6 and 14 weeks on site, with a realistic total of more like 8 to 20 weeks from the first meeting to move-in once design, approvals and procurement are included. Use those ranges as planning references, not as a promised completion date for a City of London project.

A limited refurbishment has a different profile. A cited source says a refurbishment without services changes will usually take 6–10 weeks from instruction until handover, with snagging and handover usually taking about 1–2 weeks after works completion. The approval position depends on the actual scope, so do not apply this narrow example to a project that changes services, layout or building fabric.

Put the following gates in your programme: brief approved, surveys received, design decisions made, landlord information reviewed, budget authorised, approval route confirmed, procurement completed, works started, testing completed, snagging closed and handover accepted. Ask the provider to show dependencies and float. If the proposed move-in date leaves no time for approvals, procurement or defects, treat the date as unconfirmed until the programme is rebuilt.

Make landlord and compliance checks an approval gate

Landlord and compliance checks should be approval gates before office works begin. London office fit-outs involve a regulatory framework, landlord approval process and construction market distinct from those of other major global cities . Your provider should identify which requirements apply to the proposed works and who is responsible for obtaining the relevant advice or consent.

A Licence to Alter is formal landlord consent for specified alterations and is separate from planning permission and Building Regulations approval . Commercial tenants may need a Licence to Alter before structural alterations, shopfront changes, mechanical and electrical works, or other alterations identified by the lease or landlord .

These are different approvals with different decision-makers. Ask the provider to create an approval register that names the requirement, responsible party, submission information, expected decision point and effect on the programme. Do not allow a general phrase such as “subject to approvals” to conceal an unpriced or unallocated task.

Lighting also belongs in the technical specification. Establish the applicable Building Regulations requirements for lighting energy performance and controls, and include them in the specification . Ask how the requirement is reflected in the design, pricing and installation information. The same discipline should apply to other services and technical elements that affect the operation of the workplace.

The approval question depends on the scope of refurbishment. That example does not remove the need to assess a different project. Building Regulations approval is required for most alterations to and refurbishment of existing buildings, so obtain a scope-specific assessment before relying on the narrow exception .

The design record should also show how the concept develops. Agree which stage is for exploration, which stage fixes the scope and which stage supports approval or pricing. Do not commit funds or sign an agreement on the basis of an image that has not been tested against the building and the approval route.

Seek qualified evaluation when the project changes the building

Qualified evaluation becomes necessary when the proposed works affect building fabric, services, safety, heritage or contractual obligations. Do not treat a provider’s initial view as a substitute for the professional or responsible-authority decision that applies to your premises.

The City of London contains historic assets that can change the project constraints. The City has over 600 listed buildings and 26 conservation areas, and heritage assets can impose additional development constraints (). If your premises may fall within a listed building or conservation area, ask the responsible professional or authority what assessment and consent route applies before fixing the design or committing to works.

Energy and building condition can also affect feasibility. Ask for the relevant building information and obtain qualified advice where energy performance, retrofit or landlord obligations affect your decision.

Seek prompt qualified help where the project involves any of the following:

• Structural alterations or changes to the building fabric.
• Mechanical, electrical, ventilation, fire-safety or other building services.
• A listed building, conservation-area constraint or heritage feature.
• A possible Building Regulations, planning or landlord-consent requirement.
• Contract terms, liabilities, insurance, payment obligations or changes to the lease.
• Safety questions that cannot be resolved from the project brief and building information.

Pause the commitment if a provider cannot identify the approval path, the professional responsible for the assessment or the information needed to make the decision. Do not start office works, release a construction instruction or sign a material contractual term on an assumption about permissions, cost or suitability.

Issue an approval-ready brief to City of London providers

Once the premises screen and scope schedule are complete, issue one approval-ready brief to each shortlisted route. The brief should contain six parts:

• Project snapshot: current and expected headcount, attendance pattern, work settings, meeting rooms, breakout areas, kitchen, WCs, reception, storage, growth plans and target occupation date.
• Premises record: location, building condition, access, occupation constraints, available surveys, services information, lease terms and landlord fit-out requirements.
• Scope schedule: room planning, finishes, electricals, HVAC, technical services, furniture, branding, amenities and handover items, each marked with its proposed responsibility.
• Approval questions: possible landlord consent, Building Regulations matters, lighting requirements, heritage or building constraints, and the qualified professional or responsible authority to consult where needed.
• Commercial and programme basis: preferred specification, budget approach, cost assumptions, procurement route, design and approval dependencies, construction range and handover activities.
• Responsibility schedule: the owner of design decisions, surveys, landlord submissions, procurement, contractor appointment, changes, site management, defects and post-occupation support.

This format makes the provider’s response testable. It also prevents a design-and-build, traditional, project-management or bundled proposal from appearing comparable when one of them leaves surveys, approvals, landlord interfaces or handover outside its stated role.

The provider should explain which information is still missing before its proposal can be defined, what assumptions it has made and which items require qualified guidance. If the project involves compliance, safety, structural changes or contractual terms, contact a qualified professional or the responsible authority promptly rather than relying on an assumption in the brief.

Flux HQ offers office design and build services in London, including customised fit-outs and ongoing management, and can manage the process of delivering a fully fitted and managed office space. Send the completed requirements brief to the routes you are considering, including Flux HQ where relevant, and ask for an indicative assessment of the route, scope and unresolved interfaces. Treat any estimate as indicative, not as a quote or confirmed booking.

Send the City of London requirements to Flux HQ

Flux HQ offers office design and build services in London, with spaces intended to reflect your brand and functionality. Give us the completed brief with your headcount, workplace schedule, premises information, scope, budget approach, programme and preferred responsibility model. The resulting assessment is indicative, not a quote or confirmed booking. A qualified professional or responsible authority must decide individual compliance, safety, heritage and contractual matters before you commit to the works.

What should you confirm before appointing an office design and fit-out route?

What should an office fit-out proposal include before I compare it with another?

Require the same information from each provider: scope, specification, measured area, assumptions, exclusions, provisional sums, surveys, landlord and statutory approvals, furniture and technology, professional fees, programme, responsibilities, change control and handover obligations. A lower headline figure is not comparable if it leaves more work or risk with you.

When should I obtain qualified advice for a City of London office project?

Seek prompt qualified advice where the project affects structure, building services, fire safety, heritage features, Building Regulations, planning, landlord consent, lease terms, insurance or contractual liabilities. The City’s listed buildings and conservation areas can impose additional constraints, so do not rely on assumptions about permissions or suitability.

Are office fit-out cost estimates quotations?

No.

How long does an office design and fit-out project usually take?

A cited UK guide places many projects at roughly 8 to 20 weeks from the first meeting to move-in, including design, approvals and procurement; on-site works alone may take 6 to 14 weeks.