House
extensions
in Kentish Town, NW5
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 Kentish Town house extensions across Kelly Street, Lady Somerset Road, Leighton Road - side-return, rear, wraparound and double-storey additions for Victorian terraces, Georgian Cottages and Period converted houses where planning strategy, conservation detailing, Party Wall sequencing and structural engineering need handling properly.
House Extensions in Kentish Town: What You Need to Know
Every house extension project in Kentish Town is designed to respect the Kentish Town Conservation Area and the character of Victorian terraces, Georgian cottages, period conversions. Our in-house RIBA Chartered Architects handle Camden 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.
Kentish Town properties generally benefit from more relaxed planning controls, with many extensions achievable under permitted development rights. We assess the planning route at your free site visit.
Vibrant and increasingly popular Camden neighbourhood with a mix of Victorian housing, independent businesses and excellent transport links. Strong community atmosphere with markets and arts venues. Side-return extensions are particularly popular in Kentish Town's terraced streets, transforming narrow kitchen spaces into full-width open-plan living areas connected to the garden.
Local character & heritage: extending in Kentish Town
Kentish Town is a Victorian terraced district in the London Borough of Camden, between Camden Town and the Heath-side villages, increasingly prized as a family-house area. Its streets of bay-fronted terraces, several in conservation areas, give it a consistent period character.
The signature Kentish Town project is the side-return and rear extension to open up a Victorian terrace's kitchen, often with a loft conversion for extra bedrooms. Camden expects extensions on the conservation streets to match the original brick, bays and rhythm of the terrace.
Tight terraced plots make party-wall and right-to-light matters routine, and some streets slope toward the valley, bringing level considerations — we plan both from the first design.
Kentish Town heritage & architecture: Conservation areas explained · Renovating an NW5 terrace · From rural lands to NW5 · Edwardian facades in NW5 · Mansion flats · Listed buildings in NW5 · Kentish Town Road · Best family-home streets
Kentish Town mixes several periods within a few streets, which is what makes extending here interesting. Long runs of Victorian and mid-Victorian terraces sit alongside the surviving Georgian cottages around Kelly Street, so an extension is judged against whichever grain your house belongs to.
Conservation control is precise. Camden's Kentish Town Conservation Area appraisal is used in planning assessment, and it records the old village core on Kentish Town Road, an archaeological-priority area from Leverton Street, mature street trees and the western edge of the Kenwood to St Paul's viewing corridor, so applications need to be well detailed.
The bay-fronted Victorian terraces on Lady Somerset Road, Leighton Road and Fortess Road suit rear additions, while the colour-washed Georgian cottages around Kelly Street need a gentler, conservation-led hand. To the Camden benchmark a single-storey rear extension is £71,250–£112,500 excluding VAT and a side return £90,000–£120,000 excluding VAT.
House Extensions in Kentish Town: Applied to the Local Stock
Kentish Town sits in the London Borough of Camden, with conservation areas protecting its best Victorian terraces and the surviving Georgian cottages around Kelly Street. Camden’s Kentish Town Conservation Area appraisal is used in planning assessment. It records the old village core on Kentish Town Road, an archaeological-priority area from Leverton Street towards Kentish Town Road, mature street trees, the western edge of the Kenwood to St Paul’s viewing corridor and the need for well-detailed conservation applications.
Sources: Camden Council - Conservation area appraisal and management strategies (register of all 40 CAs) (2026); Kentish Town Conservation Area appraisal and management strategy page, Camden Council (2026); Kentish Town Conservation Area Appraisal and Management Strategy (adopted February 2011), Camden Council (2026)
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 Kentish Town: Questions
What is the housing mix in Kentish Town?
Layered. It mixes several periods within a few streets — long runs of Victorian and mid-Victorian terraces alongside the surviving Georgian cottages around Kelly Street — so an extension is designed to the grain of your particular house.
Is Kentish Town a conservation area?
Yes. Camden's Kentish Town Conservation Area appraisal is used in planning assessment, and it records the old village core on Kentish Town Road, an archaeological-priority area from Leverton Street and the western edge of the Kenwood to St Paul's viewing corridor.
What does a house extension cost in Kentish Town?
A single-storey rear extension in Camden is £71,250–£112,500 excluding VAT, a side return £90,000–£120,000 excluding VAT, and a wraparound an indicative £100,000–£200,000 on the open market.
How is a kitchen extension in Kentish Town priced?
Reckon on £2,200–£3,500 per square metre of new floor area, plus a £5,000–£30,000 kitchen supply allowance, the build rate excluding VAT. Scope and specification then set the scheme figure.
Which Kentish Town streets suit extensions?
The bay-fronted Victorian terraces on Lady Somerset Road, Leighton Road and Fortess Road suit rear additions, while the colour-washed Georgian cottages around Kelly Street call for a gentler, conservation-led approach.
How much does a house extension cost in Kentish Town, NW5?
House extensions in Kentish Town typically cost £2,400–£3,800/sqm. A single-storey rear extension runs approximately £45,000–£85,000, while a double-storey extension costs £80,000–£160,000. Our fixed-price contracts include foundations, structural steelwork, full build and interior fit-out.
House Extensions in Kentish Town: Planning & Local Context
London Borough of Camden · NW5
Planning for house extensions in Kentish Town
Rear and side-return extensions are popular in Kentish Town, but permitted-development rights are frequently restricted within several Kentish Town conservation areas, so most extensions need a full planning application to London Borough of Camden with design that respects the prevailing building line and materials.
London Borough of Camden & conservation context
Kentish Town NW5 sits within several Kentish Town conservation areas, and Camden enforces Article 4 directions across its conservation areas (removing many permitted-development rights) and applies its CPG basement guidance to subterranean work. Our in-house RIBA Chartered Architects prepare and submit every application to London Borough of Camden and handle pre-application discussions where early planning advice is useful.
Building Regulations
House Extensions in Kentish Town 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 through to the completion certificate.
Recent work & local links
Explore our other Kentish Town services — Kitchen Renovation Loft Conversions — or the Kentish Town renovation hub for the full picture of how we work locally.
Our in-house planning team prepares and submits every London Borough of Camden application and manages building control end to end. View our planning track record →
More Services in Kentish Town
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We survey your property, discuss your vision and provide a clear budget framework.