Design and build6 min read

Choosing an office fit out contractor in London

How to choose an office fit out contractor in London. Delivery models, Cat A and Cat B, MEP, cost control, programme and the questions to ask.

The short answer

Choose the contractor whose structure matches the risk in your building. For a premium London workplace that needs design, construction control and coordinated mechanical and electrical services from one team, an integrated route is usually right. NU Projects works that way, with architecture, interior design, quantity surveying, construction, bespoke joinery and MEP inside one team.

That matters because an office can look right on handover and still fail. Lighting, cooling, acoustics, data, circulation and maintenance access all have to be resolved before the finishes are chosen, not after.

Office fit out contractor comparison at a glance

  • Delivery model for one point of accountability: integrated design, build and MEP
  • When to appoint the contractor: before the design and budget are fixed
  • Essential commercial controls: a clear scope, cost plan, programme, procurement schedule and change process
  • Key technical priorities: power, data, lighting, ventilation, cooling, acoustics, fire strategy and access

What a good fit out contractor does

A good office fit out contractor does far more than coordinate trades. They translate commercial goals into a workplace brief, test that brief against the building, control cost and programme, and remain accountable through commissioning and handover.

Before appointing a contractor, look for evidence of the following:

  • One coordinated design and construction team
  • Experience with Cat A, Cat A plus and Cat B requirements
  • Strong MEP design, installation and commissioning capability
  • Transparent quantity surveying and cost reporting
  • Landlord, freeholder and building management coordination
  • Building Regulations, fire safety and CDM compliance
  • Clear procurement and long lead item planning
  • Quality control for bespoke joinery, finishes and furniture
  • Practical planning for live, occupied or constrained buildings
  • Structured handover, training, certification and aftercare

A competitive tender figure is only useful when every contractor has priced the same information. Removing the ambiguity early is what makes a budget dependable and keeps changes off the site.

How NU Projects is set up

NU Projects has delivered complex, design led projects in London since 2010. The model is not volume. It is keeping the creative work, the technical coordination and the commercial control in one team, with senior people close to the project.

Founder Nick Jeffries leads the work. Our quantity surveyor, Matt Coverley, holds the cost control, the procurement and the value engineering. Our MEP director, Wayne Hockham, leads the building services strategy that makes lighting, power, data, heating, cooling and ventilation work as one system.

This senior led structure gives clients faster decisions, clearer accountability and a consistent standard from the first survey to the final handover.

The NU Projects office fit out service

Workplace brief and feasibility

The process begins with the business case. NU Projects reviews headcount, working patterns, meeting requirements, hospitality, storage, technology, brand priorities and future growth. Site surveys then identify the opportunities and constraints within the existing building.

Concept design and space planning

The team develops layouts that balance focus, collaboration, client experience and operational flow. Materials, lighting and furniture are considered alongside accessibility, acoustics, maintenance and the practical needs of each department.

Cat A and Cat B coordination

Cat A typically establishes the base building services and core workplace readiness. Cat B creates the occupier specific environment, including partitions, meeting rooms, specialist lighting, finishes, furniture, technology and brand details. NU Projects coordinates the boundary between both scopes so responsibility is clear.

Mechanical, electrical and public health services

MEP is where many fit outs either succeed or become expensive. Loads, distribution, controls, fresh air, cooling, plumbing, fire systems, lighting and data must be coordinated with ceilings, joinery and room layouts before work starts. NU MEP keeps this expertise within the wider delivery team.

Quantity surveying and commercial control

A live cost plan tracks design development, procurement and approved changes. This gives the client visibility before decisions become site costs. Value engineering is used to protect the brief and improve value, not simply to remove quality.

Construction, fit out and commissioning

Site delivery is planned around access, neighbours, building management rules and business continuity. Installation is followed by testing, commissioning, certification, demonstrations and a properly managed defects period.

How much does an office fit out cost in London?

The honest answer is that cost depends on the building, the specification and the amount of technical intervention required. Floor area alone is not enough to create a dependable budget.

The main cost drivers are:

  • Existing condition and the amount of strip out required
  • Cat A and Cat B scope boundaries
  • Heating, cooling, ventilation, power and data capacity
  • Fire strategy, accessibility and statutory upgrades
  • Acoustic performance and specialist meeting rooms
  • Bespoke joinery, stone, metalwork and premium finishes
  • Furniture, audio visual systems and security
  • Working hours, access restrictions and live building logistics
  • Professional fees, surveys, approvals, contingency and VAT

NU Projects recommends an early survey and cost plan before lease decisions or a final specification are locked. That gives the client a realistic investment range and exposes risks while there is still time to solve them intelligently.

How long does an office fit out take?

A straightforward fit out may be measured in weeks. A technically complex Cat B project, structural reconfiguration or live building refurbishment can take several months. The programme should include design, surveys, approvals, procurement, construction, commissioning and move readiness, not construction alone.

The most common delays come from late decisions, incomplete landlord information, long lead equipment, unresolved MEP design and changes made after procurement. NU Projects controls these risks through early coordination and a decision led programme.

Questions to ask every office fit out contractor

  • Who owns the design and who carries coordination responsibility?
  • Who will be the senior person accountable for my project?
  • How will MEP design be coordinated with interiors and technology?
  • What is included and excluded from the cost plan?
  • How are changes approved and reported?
  • Which landlord, freeholder and statutory approvals are required?
  • How will long lead items be identified and procured?
  • How will works be phased if the building remains occupied?
  • What testing, certification and training are included at handover?
  • What aftercare will be available once the team moves in?

Why early contractor involvement produces a better workplace

Bringing NU Projects into the project early allows buildability, cost, programme and services coordination to influence the design before compromises become unavoidable. It also creates one clear route from ambition to delivery.

For landlords, developers and occupiers, that means fewer gaps between consultants, stronger budget control and a workplace that is ready to perform from day one.

See completed work in the NU Projects portfolio, or read about the founder on Nick Jeffries’ page.

Frequently asked questions

How do I compare office fit out contractors in London?

London has national contractors, workplace design studios and traditional construction firms, and they carry different responsibilities. Compare the delivery model, the MEP capability, the cost reporting and who stays accountable at handover.

What does an office fit out contractor do?

An office fit out contractor turns a workplace brief into a completed, compliant and operational space. The work can include surveys, design, approvals, partitions, ceilings, floors, joinery, lighting, power, data, heating, cooling, ventilation, furniture, commissioning and handover.

What is the difference between Cat A and Cat B?

Cat A prepares the base building for occupation, while Cat B creates the occupier specific workplace. Exact definitions vary between buildings and leases, so the scope must be agreed with the landlord and professional team before pricing.

Can NU Projects manage MEP as part of the fit out?

Yes. NU MEP coordinates mechanical, electrical and public health services with the architecture and interior design, giving the client one accountable delivery route.

Can NU Projects work in an occupied building?

Yes, subject to surveys and an agreed logistics strategy. Phasing, access, noise, dust, temporary services and business continuity are planned around the building and its users.

When should I appoint NU Projects?

As early as possible. Early involvement gives the team time to test the brief, survey the building, coordinate MEP, prepare a cost plan and protect the programme before key decisions are fixed.

Plan your London office fit out with NU Projects

An office has to support the people in it and keep working every day. That takes the design, the technical work and the commercial control pulling in the same direction.

If you are planning an office fit out, refurbishment or MEP upgrade in London, book a private consultation with NU Projects or call 020 7731 6841. Start the conversation before the brief, budget and programme are fixed.

Published 9 February 2026. Written by the NU Projects studio, edited since for house style and accuracy.

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