House
extensions
in Earl's Court, SW5
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 design and build Earl's Court house extensions across Earl's Court's principal residential streets - side-return, rear, wraparound and double-storey additions for Stucco Italianate terraces, Garden-Square houses and Large Mansion Blocks where planning strategy, conservation detailing, Party Wall sequencing and structural engineering need handling properly.
House Extensions in Earl's Court: What You Need to Know
Every house extension project in Earl's Court is designed to respect the Earl’s Court Conservation Area and the character of stucco Italianate terraces, garden-square houses, large mansion blocks. Our in-house RIBA Chartered Architects handle RBKC planning applications, our chartered structural engineers specify any load-bearing work, and our directly-employed trades deliver the build under one fixed-price contract. We coordinate Building Control, Party Wall awards where needed, and all certifications through to handover.
Earl's Court 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 house extension projects in Earl's Court 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.
Earl's Court is a place where the Article 4 map matters more than any permitted-development shortcut. RBKC directions withdraw the right to make small external changes — windows, front doors, boundary walls and roof coverings — on streets that include Earls Court Square, Eardley Crescent, Nevern Square and Philbeach Gardens. The council has also adopted conservation-area appraisals for Earl's Court Square, Earl's Court Village, Nevern Square and Philbeach, and an extension is judged against whichever appraisal covers the address.
The setting is monumental. Built around its great garden squares, Earl's Court sets sweeping stuccoed Italianate terraces along Nevern Square and Philbeach Gardens, while Penywern Road and Earl's Court Square carry tall white-fronted houses, most now flats. With one of the highest concentrations of period conversions in the borough, many projects combine reconfiguration inside a leasehold envelope with careful repair of stucco and joinery outside.
Cost reflects that constraint rather than plan area alone. An Earl's Court rear extension falls between £71,250 and £112,500 before VAT, and a side return between £90,000 and £120,000; we size the scheme once the consent route is clear.
What a House Extension Involves
An extension reshapes how the whole ground floor works, not just how big it is — the new structure, the opening into the existing house, the kitchen and the garden connection all have to be designed as one move. We take each project from feasibility drawings through consents, structure and fit-out under a single fixed-price contract. Most extensions we build include the scope below.
- Rear extensions — single-storey additions that open the back of the house to the garden
- Side-return & wraparound — infilling the side alley of a terrace, alone or combined with a rear addition
- Double-storey — new bedrooms or bathrooms above the ground-floor addition, designed to sit comfortably with the original roofline
- Foundations & steel — groundworks, beams and the opening into the existing house, engineered by our own structural team
- Glazing — rooflights, glazed roofs and slim-framed sliding or bi-fold doors specified for light and thermal performance
- Kitchen integration — the kitchen layout planned with the architecture from the first drawing, not squeezed in afterwards
- Services & heating — electrics, plumbing, drainage and underfloor heating built into the new floor
- External works — patio, drainage connections and garden reinstatement completed within the contract
How We Run Your Project
Six stages, with the consents and engineering settled before the first spade goes in.
- Feasibility visit — we assess the site, the boundaries and your brief, and identify the right consent route for your property.
- Design & approvals — our architects draw the scheme while planning or permitted development paperwork, structural calculations and party wall notices progress together.
- Fixed-price contract — every element specified and priced before construction, from foundations to door hardware.
- Groundworks & shell — excavation, foundations, walls, steel and roof, taken to weathertight while you carry on living in the house.
- Fit-out — insulation, services, glazing, kitchen, flooring and decoration, with the opening into the existing house formed once the shell is sealed.
- Completion — building control inspection, snagging, external works and handover with the full certification pack.
Read the full house extension guide for extension types, permitted development limits and the build programme stage by stage.
Many rear extensions can proceed under permitted development — broadly up to 3m deep on attached houses and 4m on detached, extendable to 6m and 8m through the prior approval scheme — but conservation areas, Article 4 directions and listed status change the picture, and every extension needs Building Regulations approval regardless of the planning route. Where foundations come within 3m of a neighbouring building, the Party Wall etc. Act 1996 obliges you to give adjoining owners a minimum of two months’ written notice before construction can begin. Our planning guide library sets out the rules for each borough.
Why Hampstead Renovations
We hold £10 million public liability insurance with Aviva; the certificate is available on request.
House Extensions in Earl's Court: Questions
Has RBKC removed permitted-development rights on Earl's Court streets?
On many of them, yes. RBKC Article 4 directions take away permitted-development rights for small external changes — windows, front doors, boundary walls and roof coverings — on Earl's Court streets that include Earls Court Square, Eardley Crescent, Nevern Square and Philbeach Gardens. At those addresses, work permitted elsewhere requires a planning application.
Which conservation-area appraisals apply in Earl's Court?
Several adopted appraisals cover the area: Earl's Court Square (6 June 2016), Earl's Court Village (16 February 2017), Nevern Square (4 October 2018) and Philbeach (4 October 2018). Earl's Court lies within these conservation areas across its grand stuccoed garden squares, and the relevant appraisal frames how an extension is assessed.
What does a house extension cost in Earl's Court?
As London-wide guidance, an Earl's Court rear extension falls between £71,250 and £112,500 before VAT. A side return is priced higher, between £90,000 and £120,000, and a wraparound within an indicative £100,000 to £200,000 range. Since so much of the area is stuccoed and long divided into flats, consent and coordination weigh on the figure as heavily as the build.
What is the housing like in Earl's Court?
The area is laid out around great garden squares. Sweeping stuccoed Italianate terraces define Nevern Square and Philbeach Gardens; Penywern Road and Earl's Court Square add tall white-fronted houses, most long since divided into flats; and the district holds one of the borough's highest concentrations of period conversions.
Does the stucco frontage limit what I can do to an Earl's Court house?
It shapes it firmly. The typical Earl's Court stock is stucco Italianate terraces, garden-square houses and mansion flats, and the RBKC Article 4 controls reach roof coverings, windows and boundary walls on named streets. So even modest external work on a frontage is designed to keep the authentic stucco and joinery of the run intact.
Local character & heritage: extending in Earls Court
Earls Court sits in the Royal Borough of Kensington & Chelsea, and extending here means working with grand stucco terraces and garden squares, mostly now mansion and converted flats. Where houses and gardens allow, side-return and rear extensions open up the living space; in the many flats, the equivalent is internal reconfiguration and, where possible, lower-ground additions.
Permitted-development rights are usually restricted in Earls Court's conservation areas, so most extensions need a full householder application, and most homes are leasehold flats and many buildings are listed. We design every extension to respect the period frontage and to win consent.
Earls Court heritage & architecture: Conservation areas · Roof developments & conservation · Listed buildings · Renovating a period terrace · Period facades · Facade planning rules
House Extensions in Earl’s Court: Planning & Local Context
the Royal Borough of Kensington & Chelsea · SW5
Planning for house extensions in Earl’s Court
Rear and side-return extensions are popular in Earl’s Court, but permitted-development rights are frequently restricted within Earl’s Court's conservation areas, so most extensions need a full planning application to the Royal Borough of Kensington & Chelsea with design that respects the prevailing building line and materials.
the Royal Borough of Kensington & Chelsea context
Earl’s Court SW5 sits within Earl’s Court'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. Earl’s Court spans the Royal Borough and Hammersmith & Fulham. 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
House Extensions in Earl’s Court must satisfy Building Regulations — covering structural design to Part A, thermal performance to Part L, and drainage and foundations agreed with Building Control. Our in-house engineers manage Building Control from initial notice to completion certificate.
Recent work & local links
Explore our other Earl’s Court services — Kitchen Renovation Loft Conversions — or the Earl’s Court renovation hub.
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 →
More Services in Earl's Court
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We survey your property, discuss your vision and provide a clear budget framework.