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RICS surveying support for party walls, licence to alter, conservation-area works & neighbour mattersWe design and build Wimbledon house extensions across Wimbledon's principal residential streets - side-return, rear, wraparound and double-storey additions for Victorian villas, Arts & Crafts houses and Wimbledon Village Period terraces where planning strategy, conservation detailing, Party Wall sequencing and structural engineering need handling properly.
Every house extension project in Wimbledon is designed to respect the Wimbledon Village Conservation Area and the character of Victorian villas, Arts & Crafts houses, Wimbledon Village period terraces, mansion flats. Our in-house RIBA Chartered Architects handle Merton 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.
Wimbledon has conservation area coverage in parts, so some properties will need planning permission for external changes while others may proceed under permitted development. We assess each property individually.
Our house extension projects in Wimbledon 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.
What sets Wimbledon apart is the ground its houses stand on. Larger plots make extensions and basements common currency here, with Merton keeping a careful eye on external change in its conservation areas through Article 4 controls. Arthur Road climbs past grand detached homes towards the common, Parkside faces it with some of the area's largest houses and mansion flats, and the wider stock of Victorian villas, Arts & Crafts houses and Village homes gives most projects generous fabric to work with.
The Village demands the most care. The Wimbledon Village conservation area protects the historic streets above the common — designated in 1968, extended on 12 July 2007 and covering 7.25 hectares — and it is one of seven Wimbledon designations on Merton's list, each with a published map. Checking which designation, if any, applies to an address is the first step of any extension design here.
The familiar London bands anchor the numbers: rear single-storey schemes between £71,250 and £112,500 excluding VAT, side returns between £90,000 and £120,000 excluding VAT, and wraparounds at an indicative £100,000–£200,000 — flexed in each case by house structure, facade and window decisions, party walls and access.
Wimbledon sits in the London Borough of Merton, with the Wimbledon Village conservation area protecting the historic streets above the common. The Wimbledon Village Conservation Area was designated in 1968 and extended on 12 July 2007, and covers 7.25 hectares (17.92 acres). Wimbledon Village was originally part of the larger Wimbledon Conservation Area, designated in 1968 and extended in 1976 and 1986, which was then subdivided because of its size and varied character into a tight boundary around the commercial area of Wimbledon Village and the two residential areas of Wimbledon North and Wimbledon West.
Merton's conservation area list includes seven Wimbledon designations - Wimbledon Village, Wimbledon North, Wimbledon West, Wimbledon Broadway, Wimbledon Chase, Wimbledon Hill Road and Wimbledon Windmill - each with a published map, and several with adopted character assessments and design guides.
Sources: Merton Council, West Wimbledon Conservation Area Character Assessment (2004) + Wimbledon Village CA design guide (1996) and CA map (2026); Merton Council, Wimbledon Village Conservation Area map (2026); Merton Council, Wimbledon Village Conservation Area Design Guide (March 1996) (2026); Merton Council, List of conservation areas (2026)
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.
Six stages, with the consents and engineering settled before the first spade goes in.
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.
Extensions go wrong in the gaps between architect, engineer and builder — so we removed the gaps. The scheme is designed by our in-house RIBA Chartered Architects, the steel and foundations are calculated by our own structural engineers, and party wall matters are supported by RICS surveying through our sister company, Hampstead Chartered Surveyors. The build is delivered by teams we use project after project, under a fixed-price JCT contract carrying £10M professional indemnity and public liability cover, 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.
Closely where it shows. Merton scrutinises external change in its conservation areas and applies Article 4 controls — but Wimbledon's larger plots are exactly why extensions and basements are so common here, so a well-judged scheme has plenty of room to succeed.
The detached streets by the common. Arthur Road climbs past grand detached homes towards the common, and Parkside carries some of the largest houses in Wimbledon — large properties well suited to whole-house refurbishment, extensions, lofts and basements.
Start from the London-wide bands: single-storey rear work sits at £71,250–£112,500 excluding VAT and a side return at £90,000–£120,000 excluding VAT. We then scope the specific Wimbledon house before pricing anything.
Merton publishes the answer. The borough's list carries seven Wimbledon designations — Wimbledon Village, Wimbledon North, Wimbledon West, Wimbledon Broadway, Wimbledon Chase, Wimbledon Hill Road and Wimbledon Windmill — each with a published map and several with adopted character assessments and design guides, and the Village designation protects the historic streets above the common. We confirm the position for your address at the first conversation.
Where the ground allows, yes. The indicative London band for a wraparound is £100,000–£200,000, and where a Wimbledon scheme lands turns on the fabric: house structure, facade and window decisions, party walls, roof or rear interfaces and access all shape the final figure.
Wimbledon sits in the London Borough of Merton, and extending here means working with Victorian and Edwardian villas and family houses, with the Village conservation area. 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 Wimbledon's conservation areas, so most extensions need a full householder application, and the Village and its surrounds are conservation-protected and some homes are listed. We design every extension to respect the period frontage and to win consent.
Wimbledon heritage & architecture: Roof developments & conservation · Conservation areas · Listed buildings · Renovating a period terrace · Period facades · Facade planning rules
London Borough of Merton · SW19
Rear and side-return extensions are popular in Wimbledon, but permitted-development rights are frequently restricted within Wimbledon's conservation areas, so most extensions need a full planning application to London Borough of Merton with design that respects the prevailing building line and materials.
Wimbledon SW19 sits within Wimbledon's conservation areas, and Merton's Local Plan and the Wimbledon Village and Common conservation areas tightly control alterations. Our in-house RIBA Chartered Architects prepare and submit every application to London Borough of Merton and handle pre-application discussions where early planning advice is useful.
House Extensions in Wimbledon 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.
See recent Wimbledon work: Holland Avenue, Wimbledon. Explore our Kitchen Renovation Loft Conversions in Wimbledon, or the Wimbledon hub · Refurbishment Company in Wimbledon.
Our in-house planning team prepares and submits every London Borough of Merton application and manages building control end to end. View our planning track record →
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.
We survey your property, discuss your vision and provide a clear budget framework.