Flat
refurbishment
in Chelsea, SW3
Architects, Engineers, Surveyors & Builders Under One Roof.
One Studio. One Contract. One Team.
RICS surveying support for party walls, licence to alter, conservation-area works & neighbour mattersWe've completed flat refurbishments across Carlyle Mansions, Whitelands House, Rossetti Garden Mansions - mansion blocks and period conversions where freeholder approvals, acoustic compliance and access logistics need handling properly.
Flat Refurbishment in Chelsea: What You Need to Know
Refurbishing a Chelsea flat is not the same as refurbishing a house. The Licence to Alter is usually required before a single brick moves, Part E of the Building Regulations dictates floor and ceiling build-ups, and site logistics must account for lift protection, works-hours restrictions, and neighbour disruption. Our team manages freeholder surveyors, Party Wall awards, and RBKC Building Control in parallel so your project starts cleanly and finishes without disputes.
Chelsea falls within a conservation area, which means visible external alterations require careful design and often full planning permission. Our architects have extensive experience securing approvals in RBKC's conservation areas.
Our flat refurbishment projects in Chelsea are delivered by our in-house team of RIBA architects, structural engineers and specialist tradespeople. Every project is managed under a single fixed-price contract with no hidden costs.
Flat refurbishment in Chelsea is shaped by who owns the ground beneath it. The Cadogan Estate consents much of SW3, and for flats that means a Licence to Alter — an approval obtained from the estate before refurbishment can begin. Nowhere is this clearer than in the grand red-brick mansion blocks of Cadogan Square, where projects are coordinated with the Royal Borough and with the estate's consent process side by side. With Georgian townhouses, Victorian stuccoed villas and prime mansion flats that are many listed and mostly leasehold, refurbishment here answers to borough and estate alike.
The licence never travels alone. Where estate consent applies it sits beside planning permission, Listed Building Consent and Building Regulations — separate approval strands, each with its own timetable — and in the mansion flats the technical questions of structure, acoustics and an exacting finish are resolved inside that same framework rather than bolted on after it.
What keeps these programmes on time is sequence. The estate's requirements and the borough's are pinned down before design work is committed, so no consent surfaces late — the discipline that, in our experience, keeps a Chelsea refurbishment on its planned course and its budget honest.
Flat Refurbishment 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. The Cadogan Estate consents much of the land; flats need a Licence to Alter.
Sources: RBKC conservation area maps (register of the borough's conservation areas) (2026); Cadogan Estates - residential customer guidance on alterations and Licence to Alter (2026)
What a Flat Refurbishment Involves
Refurbishing a flat means renovating inside a building you share — so the job is as much about leases, neighbours and building rules as it is about kitchens and finishes. We plan every project around the consents your lease demands and the protocols your block expects, then deliver the technical work under one fixed-price contract. A typical scope covers the elements below.
- Licence to Alter — lease review, application pack and freeholder’s surveyor queries handled on your behalf
- Acoustic build-up — separating floors and walls upgraded to meet Building Regulations Part E and any stricter freeholder schedule
- Wet-room tanking — certified waterproofing beneath every bathroom, flood-tested before tiling and covered by a 12-month defects period
- Rewire & replumb — new circuits, pipework and heating, coordinated with the building’s risers and stacks
- Layout changes — internal openings engineered, approved by building control and cleared with the freeholder where the lease allows
- Kitchens & bathrooms — designed, supplied and fitted to the specification tier you select
- Period detail — cornicing, sash windows and fireplaces retained and repaired in conversion flats
- Block protocols — lift protection, booked deliveries, restricted noisy hours and daily cleaning of communal areas
How We Run Your Project
Six stages, sequenced so freeholder consent never holds up the start on site.
- Survey & lease review — we measure the flat, inspect the services and read your lease to identify exactly which consents apply.
- Design & consents — our architects develop the layout while the Licence to Alter application runs in parallel, not afterwards.
- Fixed-price contract — an itemised specification agreed in full, with the acoustic and tanking details written in.
- Strip-out & first fix — soft strip, structural openings, cabling, pipework and the acoustic carcass, all removed and delivered through agreed routes.
- Second fix & finishes — kitchen, bathrooms, joinery, flooring and decoration.
- Testing & handover — snagging, certification and reinstatement of any communal areas before the keys come back to you.
Read the full flat refurbishment guide for flat typologies, specification tiers and the Licence to Alter process in detail.
Almost every leasehold flat needs formal freeholder consent — a Licence to Alter — before structural work, new flooring or services alterations can begin, and proceeding without one puts your lease at risk. Building Regulations apply on top: Part E sound insulation between dwellings, electrical and heating sign-off, and fire safety where walls or floors are opened. Flats and maisonettes also have no permitted development rights, so external changes always need a planning application. Our planning guide library covers the rules borough by borough.
Why Hampstead Renovations
Flat refurbishment rewards a team that already knows what freeholders and managing agents will ask for. Design is led by our in-house RIBA Chartered Architects, lease and party-structure matters are supported by RICS surveying through our sister company, Hampstead Chartered Surveyors, and the build is carried out by our own long-standing teams. Every contract is fixed-price on JCT terms, backed by £10M public liability insurance — the level major London freeholders require — plus a 12-month defects period and a 10-year workmanship warranty. Enquire before 2pm on a weekday and we will call you back the same day.
What does a flat refurbishment cost in Chelsea?
A flat refurbishment in Chelsea runs £900–£1,700/sqm excluding VAT, and a full two-bedroom refurbishment typically lands between £60,000 and £110,000. Most programmes take 16–32 weeks on site. A written scope and site assessment are needed before any project price can be fixed.
| Scope of work | Guide rate | Typical total |
|---|---|---|
| Full flat refurbishment (2-bed) | £900–£1,700/sqm | £60,000–£110,000 |
| Typical programme | 16–32 weeks on site | |
Guide rates exclude VAT and are set by depth of work, not by property type. Compare scopes in our London refurbishment cost-per-square-metre guide.
Flat Refurbishment in Chelsea: Questions
What should I budget for a flat refurbishment in Chelsea?
As a benchmark, the London-wide band for a full refurbishment of a two-bedroom flat is £60,000–£110,000 excluding VAT. We then price your Chelsea project properly from a scope and finishes schedule rather than from a headline rate alone.
Who has a say over refurbishment works to a Cadogan Square flat in Chelsea?
Two authorities, in practice. The grand red-brick mansion flats and houses of Cadogan Square are leasehold projects, and works there are coordinated with both the Royal Borough of Kensington and Chelsea and the Cadogan Estate's consents. We run those approvals together so neither one stalls the programme.
What range of flats do you refurbish in Chelsea?
Everything the area offers. 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 — a mix of listed townhouses and prime leasehold flats — and each building type brings its own refurbishment logic, which is where our design work starts.
Do RBKC's conservation areas have any bearing on a Chelsea flat refurbishment?
They set the backdrop. SW3 falls across five entries on the borough's conservation-area register — Chelsea, Chelsea Park Carlyle, Cheyne, Royal Hospital and Sloane Square — and most external work in the area is weighed against conservation-area tests. RBKC protects nearly three quarters of its borough this way, across 38 designations, so where a flat scheme touches windows, facades or anything else visible from outside, that element is designed to the conservation standard from day one.
How much does a flat refurbishment cost in Chelsea?
Guide rates in Chelsea are £900–£1,700/sqm excluding VAT, with a full two-bedroom refurbishment typically between £60,000 and £110,000, over a 16–32 weeks programme. A written scope and site assessment come before any fixed price.
Local character & heritage: renovating flats in Chelsea
Chelsea sits in the Royal Borough of Kensington & Chelsea, and a large share of its homes are leasehold flats — within Georgian and Victorian townhouses, mews and garden squares. Refurbishing one is a full interior project: reconfiguring the layout, renewing services and finishes, and often combining or reworking rooms within the existing footprint.
The work runs under the lease, so the freeholder's or managing agent's consent sits alongside Building Regulations and the Party Wall Act usually applies between flats; external elements such as windows stay controlled in conservation areas. Because a very high proportion of houses are listed and the borough operates a strict basement policy, we coordinate the lease, the freeholder and the build as one fixed-price contract.
Chelsea heritage & architecture: Renovating a flat · Kitchens in period flats · Licence to alter · Mansion flats · Conservation areas · Roof developments & conservation
Flat Refurbishment in Chelsea: Planning & Local Context
the Royal Borough of Kensington & Chelsea · SW3
Planning for flat refurbishment in Chelsea
Flat refurbishment in Chelsea sits across two consent regimes: the Royal Borough of Kensington & Chelsea for planning and building control, and your freeholder for a licence to alter covering structural changes, new services and floor build-ups — essential within Chelsea's conservation areas and most mansion blocks.
the Royal Borough of Kensington & Chelsea context
Chelsea SW3 sits within Chelsea's conservation areas, and the Royal Borough operates one of the country's strictest planning regimes — its basement policy limits excavation to a single storey beneath the footprint, and listed-building and conservation control is extensive. Our in-house RIBA Chartered Architects prepare and submit every application to the Royal Borough of Kensington & Chelsea and handle pre-application discussions where early planning advice is useful.
Building Regulations
Flat Refurbishment in Chelsea must satisfy Building Regulations — covering sound insulation to Part E, fire compartmentation to Part B, and certified electrical and plumbing works. Our in-house engineers manage Building Control from initial notice to completion certificate.
Recent work & local links
See recent Chelsea work: King’s Road, Chelsea Basement conversion, Chelsea. Explore our Kitchen Renovation Loft Conversions in Chelsea, or the Chelsea hub · Refurbishment Company in Chelsea.
Our in-house planning team prepares and submits every the Royal Borough of Kensington & Chelsea application and manages building control end to end. View our planning track record →
Guides & Local Reading
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We survey your property, discuss your vision and provide a clear budget framework.