Builders
in Chelsea, SW3
Architects, Engineers, Surveyors & Builders Under One Roof.
Surveyor-led refurbishment advice via Hampstead Chartered Surveyors →One Studio. One Contract. One Team.
We deliver Chelsea building projects with an integrated design-build team under one fixed-price contract - RIBA design, structural engineering, party wall coordination, procurement, directly managed site teams, Building Control, programme control and final handover through one accountable fixed-price contract.
The numbers explain why building in Chelsea is a specialism. RBKC states that nearly three quarters of the borough is protected by 38 separate conservation areas, and Chelsea's own streets fall across several entries on the register — the Chelsea, Chelsea Park Carlyle, Cheyne, Royal Hospital and Sloane Square conservation areas are all listed — so most external work in SW3 is assessed against conservation-area tests. Article 4 directions go further still, withdrawing permitted development rights for small-scale changes such as replacing windows and front doors, rebuilding boundary walls and altering roof coverings at listed properties on Cadogan Square, Carlyle Square, Chelsea Park Gardens, Chelsea Square, Glebe Place and the King's Road.
Then there is the landlord. The Cadogan Estate consents much of the land, flats need a Licence to Alter, and estate consent can run alongside planning, Listed Building Consent and Building Regulations — four approval tracks on a single job. The buildings repay the effort: Chelsea runs from the riverside houses of Cheyne Walk and Tite Street through the Georgian and Victorian streets off the King's Road to the red-brick mansions of Cadogan Square.
Budget-wise, a cosmetic renovation of a three-to-four-bed terrace runs £90,000–£180,000 excluding VAT on London-wide bands and a back-to-brick renovation £275,000–£475,000, with river proximity and high finish adding further cost.
Builders in Chelsea: Applied to the Local Stock
Chelsea’s streets fall across several conservation areas on RBKC’s register — the Chelsea, Chelsea Park Carlyle, Cheyne, Royal Hospital and Sloane Square conservation areas are all listed — so most external work in SW3 is assessed against conservation-area tests. RBKC states that nearly three quarters of the borough is protected by 38 separate conservation areas, and that proposals in them must preserve or enhance the historic or architectural character or appearance of the conservation area.
Sources: RBKC conservation area maps (register of the borough's conservation areas) (2026); RBKC - Conservation areas (heritage and conservation overview page) (2026)
What Our Building Service Covers
Hiring a builder should mean hiring one accountable team, not refereeing a chain of subcontractors. As a design-and-build practice we carry your project from drawings to handover under a single fixed-price contract, with the architect, engineer and site manager answerable to the same programme. The scope below covers most of the building work we are asked to price.
- Extensions — rear, side-return and wraparound additions, built weathertight before the existing house is opened up
- Loft & basement conversions — new storeys above and below, with steelwork and waterproofing engineered in-house
- Structural alterations — load-bearing wall removals, new openings and floor changes with calculations done before pricing
- Refurbishment — whole-house or single-floor upgrades sequenced so trades never queue behind each other
- Kitchens & bathrooms — first fix to final silicone, delivered by the same teams who built the rooms around them
- Mechanical & electrical — rewires, heating systems and ventilation installed and certified as part of the main contract
- Joinery & carpentry — doors, staircases, skirting and fitted furniture made to suit the age of the building
- External & facade works — brickwork, render, roofing repairs and landscaping tied into the main programme
How We Run Your Project
Six checkpoints between first phone call and final handover, each signed off before the next starts.
- Site visit & scope — we walk the property with you, test what the budget can realistically deliver and flag constraints early.
- Drawings & approvals — our architects prepare the design and handle whatever consents the work requires.
- Itemised fixed price — every trade, material and provisional sum listed line by line, so nothing is priced twice.
- Mobilisation — protection, welfare, neighbour notifications and deliveries organised before the first skip arrives.
- The build — structural work, first fix, second fix and finishes run by a dedicated site manager you can reach directly.
- Handover — a walked snagging inspection, full certification pack and aftercare contact once the site is cleared.
Almost all building work of this scale needs Building Regulations approval — structural openings, electrics, drainage, heating and fire safety are each inspected and certified through building control, which we manage on your behalf. Where the works cut into, bear on or excavate near a wall shared with a neighbour, the Party Wall etc. Act 1996 obliges you to serve notice before starting, and we coordinate the surveyors so the programme is not held hostage to it. Our planning guide library sets out what applies borough by borough.
Why Hampstead Renovations
The word “builder” covers everything from a van and a ladder to a full construction practice, so credentials matter. Ours: design by our in-house RIBA Chartered Architects, structural calculations from our own chartered structural engineers, and RICS surveying support through our sister company, Hampstead Chartered Surveyors, for party wall and condition matters. Every project runs on a fixed-price JCT contract, carries £10M public liability insurance, and is backed by a 12-month defects period plus a 10-year workmanship warranty. Enquire before 2pm on a weekday and we will call you back the same day.
Builders in Chelsea: Questions
How many approvals does building work in Chelsea involve?
Potentially four tracks at once: Cadogan Estate consent and leasehold Licence to Alter requirements can run alongside planning, Listed Building Consent and Building Regulations. The estate consents much of the land in Chelsea, so we map every approval the scheme needs before pricing or programming it.
Do small building jobs in Chelsea really need planning permission?
Some do. RBKC Article 4 directions withdraw permitted development rights for small-scale external changes — replacing windows and front doors, removing or rebuilding boundary walls, roof coverings and other front-elevation works — at listed properties on streets including Cadogan Square, Carlyle Square, Chelsea Park Gardens, Chelsea Square, Glebe Place and the King's Road, so those works need planning permission.
What types of Chelsea property do your builders work on?
Everything from the historic riverside houses of Cheyne Walk and Tite Street to the Georgian and Victorian streets off the King's Road and the red-brick mansions around Cadogan Square — listed townhouses, stuccoed villas and prime leasehold flats, many governed by both the borough and the estate.
Which conservation areas will a Chelsea building project be judged against?
It depends on the street: RBKC's register lists the Chelsea, Chelsea Park Carlyle, Cheyne, Royal Hospital and Sloane Square conservation areas across SW3, within a borough where nearly three quarters of the land is covered by 38 conservation areas — and proposals must preserve or enhance the historic or architectural character of the area they sit in.
What does a full house renovation cost in Chelsea?
On London-wide bands excluding VAT, a cosmetic renovation of a three-to-four-bed terrace runs £90,000–£180,000 and a back-to-brick renovation £275,000–£475,000; river proximity and high finish add further cost in Chelsea, so we confirm a scheme-specific figure once scope and consents are settled.
How do you differ from a standalone builder in Chelsea SW3 / SW10?
Most builders subcontract design, structural engineering and planning — leaving you managing four to six separate firms with overlapping responsibilities and gaps where things get dropped. We are one practice with every discipline in-house: RIBA chartered architects, surveying support through Hampstead Chartered Surveyors, IStructE chartered engineers and our own build teams. That means one contract, one point of responsibility, one fixed price.
Builders in Nearby Areas
Book a Free Consultation
Visit our studio or invite us to survey your home. We’ll assess scope, discuss design possibilities and provide an honest budget framework — completely free.
Free Consultation
We survey your property, discuss your vision and provide a clear budget framework.