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14 companies · grouped by project size

Office De-fit and Strip Out Contractors in London

De-fit is the reverse of fit out: returning an office to the condition the lease requires before you hand it back. That usually means stripping partitions, removing the kitchen and finishes, making good the ceiling and floor, and reinstating anything the lease says must be reinstated. Done badly it is the most expensive part of leaving a building, because the landlord's dilapidations claim fills any gap.

Before the list

How to read this shortlist

The contractors here either list de-fit and dilapidations as a service or are refurbishment contractors large enough to run strip out as part of a wider programme. For most occupiers the practical choice is to appoint the firm doing your new fit out to handle the de-fit of the old space as well.

01

Dilapidations: negotiate before you strip

The lease schedule of condition and the landlord's dilapidations schedule define the job. Before instructing a de-fit, get a building surveyor to review both; landlords frequently claim for reinstatement that the lease does not require, and a negotiated cash settlement is often cheaper than the physical work. Several contractors on this page work with dilapidations surveyors routinely and can price both options.

The shortlist

14 companies by project size

Grouped by the floor areas each firm is set up to deliver, because that is the first thing that rules a contractor in or out. Alphabetical within each band, featured firms included, so nothing is hidden behind a paywall.

Boutique specialists

Under 5,000 sq ft · 1 firms

Typical projects £50k to £500k for scale ups, professional services and creative firms. One team designs, builds and furnishes.

Boutique
JR
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JBH Refurbishments

Under 5k sq ft

Turnkey office fit out. Medical fit out capability. Free complementary site visits. London, Kent, Surrey, Sussex.

Refurbishment led, boutique band. Names Goalhanger and Allergy Centre of Excellence among its clients.

Projects
Under 5k sq ft
Client size
Up to 40 staff
Budget
£50k to £500k
Fit OutDesignPartitioning+4
Public data, March 2026Profile

Mid market contractors

5,000 to 30,000 sq ft · 10 firms

The core of the London occupier market. £300k to £5m projects, usually design and build, with dedicated project managers.

B CorpMid Market
AF
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Area (Fourfront Group)

Est. 2000

Coworking/flex space, education, laboratory fit out. Founders of The United Workplace global network. 10+ offices across Europe.

Refurbishment led, mid market band, trading since 2000, part of Fourfront Group, 250+ (group) staff, B Corp certified. Names Citrix and Infosys among its clients.

Projects
5k to 30k sq ft
Client size
80 to 400 staff
Budget
£1m to £10m
Workplace ConsultancyDesignFit Out+3
Public data, March 2026Profile
Mid Market
BW
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BW: Workplace Experts

Est. 2000

Defect free delivery ethos. Projects £1m to £50m+. Fiercely independent. Directly employs many tradespeople.

Design and build, mid market band, trading since 2000. Names Virgin Media and O2 among its clients.

Projects
5k to 30k sq ft
Client size
80 to 400 staff
Budget
£1m to £10m
Cat A RefurbishmentCat B Fit OutCampus Refurbishment+2
Public data, March 2026Profile
Mid Market
CG
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Claremont Group Interiors

Est. 1996

70%+ repeat business. Hybrid workspace design.

Cat A and Cat B, mid market band, trading since 1996, 120+ staff, employee owned. Names AQA and Flutter/Paddy Power among its clients.

Projects
5k to 30k sq ft
Client size
80 to 400 staff
Budget
£1m to £10m
Workplace ConsultancyInterior DesignCat A Fit Out+4
Public data, March 2026Profile
Mid Market
CS
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Constructive Space

Est. 1978

Directly employs own tradesmen (rare in sector). Strong charity/not for profit sector presence.

Design and build, mid market band, trading since 1978. Names Shelter and L'Oréal among its clients.

Projects
5k to 30k sq ft
Client size
80 to 400 staff
Budget
£1m to £10m
Office D&BFit Out ContractingRefurbishment+5
Public data, March 2026Profile
Mid Market
MI
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Maris Interiors

Est. 1977

10,000+ projects completed.

Design and build, mid market band, trading since 1977. Names Lacoste and ServiceNow among its clients.

Projects
5k to 30k sq ft
Client size
80 to 400 staff
Budget
£1m to £10m
Office DesignCat A Fit OutCat B Fit Out+5
Public data, March 2026Profile
B CorpMid Market
OK
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Oktra

Est. 1995

Design & build exclusively. Coworking/flex design. University refurbishment.

Cat A and Cat B, mid market band, trading since 1995, B Corp certified. Names Gymshark and Adidas among its clients.

Projects
5k to 30k sq ft
Client size
80 to 400 staff
Budget
£1m to £10m
Workplace ConsultancyCat A Fit OutCat B Fit Out+5
Public data, March 2026Profile
Mid Market
PA
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Parkeray

Est. 1997

Three divisions: Lite (under £500k), Interiors (larger schemes), Regions (Cambridge/Home Counties). Wellness driven design.

Design and build, mid market band, trading since 1997, ~100–150 staff. Names Tech Companies among its clients.

Projects
5k to 30k sq ft
Client size
80 to 400 staff
Budget
£1m to £10m
Interior Fit OutCommercial RefurbishmentDesign & Build+1
Public data, March 2026Profile
Mid Market
PR
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Peldon Rose

Est. 1987

End to end bespoke design & build. In house M&E team. 30+ years London specific experience.

Design and build, mid market band, trading since 1987, ~120–148 staff. Names Hampshire Trust Bank and Aristocrat among its clients.

Projects
5k to 30k sq ft
Client size
80 to 400 staff
Budget
£1m to £10m
Workplace StrategyDesign & BuildCat A Fit Out+6
Public data, March 2026Profile
Mid Market
PC
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Proici Commercial Interiors

Est. 2000

Free office design on all projects. Crittall glass partitions. Bespoke joinery. National coverage from Clerkenwell base.

Refurbishment led, mid market band, trading since 2000.

Projects
5k to 30k sq ft
Client size
40 to 250 staff
Budget
£300k to £5m
Office DesignFit OutRefurbishment+3
Public data, March 2026Profile
Mid Market
SI
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Saracen Interiors

Est. 1990

25+ years experience across London, Manchester and Hampshire offices.

Design and build, mid market band, trading since 1990. Names Clearwater International and Tata Communications among its clients.

Projects
5k to 30k sq ft
Client size
40 to 250 staff
Budget
£300k to £5m
Office D&BRefurbishmentFit Out+5
Public data, March 2026Profile

Enterprise contractors

30,000 sq ft and above · 3 firms

Landlord Cat A programmes, corporate headquarters and multi floor phased schemes. Usually with an independent architect and cost consultant.

Enterprise
ML
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Morgan Lovell

Est. 1977

Design led office fit out, workplace consultancy, biophilic design. 78%+ repeat business rate.

Refurbishment led, enterprise band, trading since 1977, part of Morgan Sindall Group plc, 201–500 staff. Names UniCredit and Greystar among its clients.

Projects
30k+ sq ft
Client size
250+ staff
Budget
£5m and above
Workplace ConsultancyOffice DesignRefurbishment+4
Public data, March 2026Profile
Enterprise
OV
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Overbury

Est. 1942

UK's leading fit out specialist. 91% net promoter score. Projects up to £200m.

Design and build, enterprise band, trading since 1942, part of Morgan Sindall Group plc, ~1,000 staff. Names Virgin Media O2 and GSK among its clients.

Projects
30k+ sq ft
Client size
250+ staff
Budget
£5m and above
Cat A Fit OutCat B Fit OutDesign & Build+3
Public data, March 2026Profile
Enterprise
WD
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Willmott Dixon Interiors

Est. 1852

Heritage preservation, sustainable refurbishment, public sector. 500,000+ sq ft delivered in prestigious London locations.

Design and build, enterprise band, trading since 1852, part of Willmott Dixon Group, 4,000+ (group) staff.

Projects
30k+ sq ft
Client size
250+ staff
Budget
£5m and above
Cat B Office Fit OutCommercial RefurbishmentDesign & Build+1
Public data, March 2026Profile
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Frequently asked questions

How much does an office de-fit cost?+

Typically £10 to £30 per sq ft depending on how much needs reinstating. A light strip out of partitions and finishes sits at the bottom of that range; full reinstatement of M&E and ceilings to a Cat A standard sits at the top.

How long does a strip out take?+

A 5,000 sq ft floor can be stripped and made good in two to four weeks. Larger floors and reinstatement of building services extend that to six to ten weeks.

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