House Extensions Camden NW1 2026: Complete Guide to Costs, Planning and Design

Camden is one of North London's most vibrant and sought-after boroughs for house extensions. The London Borough of Camden encompasses outstanding residential areas including Primrose Hill, Belsize Park, Kentish Town, Chalk Farm, Gospel Oak and West Hampstead — all characterised by large Victorian and Edwardian terraced and semi-detached houses with high property values and strong family buyer demand. LCCL Construction delivers house extensions across Camden as part of our complete design and build service.

LCCL Construction — specialist house extension builders in Camden NW1 and North London

House Extensions Camden NW1: Best Types for Local Properties

Camden's Victorian terraced houses are ideally suited to side return extensions, rear extensions and wraparound extensions. Many Camden terraces have a back addition making the wraparound the outstanding choice for creating a large open plan ground floor. The larger Victorian and Edwardian semi-detached houses in Belsize Park and West Hampstead suit double storey extensions.

How Much Do House Extensions Cost in Camden in 2026?

Rear extension: £42,000 to £76,000.

Side return: £42,000 to £76,000.

Wraparound: £72,000 to £118,000.

Double storey: £95,000 to £158,000. All include full design and build.

See our full house extension cost guide.

Planning Permission for House Extensions in Camden

Camden has extensive conservation area coverage. Major conservation areas include Primrose Hill, Belsize, Gospel Oak, Dartmouth Park and Kentish Town — covering large parts of the borough. Within conservation areas planning permission is required for most extensions. LCCL Construction checks all planning requirements. See our guide to house extension planning permission in London.

How Much Value Does a House Extension Add in Camden?

Camden property values are among the highest in North London. A wraparound extension costing £85,000 to £110,000 can add £160,000 to £300,000 in value — a return of 170 to 300 per cent. See our guide on how much value an extension adds in London.

Areas of Camden We Cover

LCCL Construction covers all areas of Camden including Camden Town NW1, Primrose Hill NW1 NW3, Chalk Farm NW1, Belsize Park NW3, Kentish Town NW5, Gospel Oak NW5, Tufnell Park N7, West Hampstead NW6, Hampstead NW3, Swiss Cottage NW3, Holborn WC1 and all surrounding postcodes.

Frequently Asked Questions About House Extensions in Camden

How much does a house extension cost in Camden?

Costs range from £42,000 for a small rear extension to £158,000 for a large double storey. A typical wraparound costs £72,000 to £118,000.

Do I need planning permission for a house extension in Camden?

Many extensions in Camden require planning permission due to conservation area coverage. LCCL Construction checks all planning requirements as part of the free consultation.

To get a free consultation call LCCL Construction on 020 8037 7332 or get an instant quote online.