House Extensions Crouch End N8 & Hornsey N8 2026: Complete Guide to Costs and Planning

Crouch End and Hornsey are two of North London's most popular and characterful residential areas, known for their independent shops, strong community feel and outstanding Victorian and Edwardian housing stock. Both areas sit in the N8 postcode — with Crouch End centred on The Broadway and Hornsey spread across the lower slopes towards Wood Green and Harringay. The concentration of large Victorian terraced and semi-detached houses across both areas makes them excellent for house extensions. LCCL Construction delivers house extensions across Crouch End, Hornsey and all surrounding North London areas as part of our complete design and build service.

LCCL Construction — specialist house extension builders in Crouch End N8 and Hornsey

House Extensions Crouch End and Hornsey: Best Types for Local Properties

Crouch End and Hornsey's Victorian terraced houses are ideally suited to side return extensions, rear extensions and wraparound extensions. Many properties in both areas have a back addition alongside the rear — making the wraparound extension an outstanding option for creating a wide open plan ground floor. The larger Edwardian semi-detached houses suit double storey rear extensions. Property values across Crouch End in particular have risen significantly over the past decade, making house extensions an increasingly strong investment.

How Much Do House Extensions Cost in Crouch End and Hornsey in 2026?

Rear extension: £42,000 – £90,000 inc. VAT (£35,000 – £75,000 + VAT).

Side return: £42,000 – £93,600 inc. VAT (£35,000 – £78,000 + VAT).

Wraparound: £72,000 – £153,600 inc. VAT (£60,000 – £128,000 + VAT).

Double storey: £90,000 – £198,000 inc. VAT (£75,000 – £165,000 + VAT).

All include full design and build. See our full house extension cost guide.

Planning Permission for House Extensions in Crouch End and Hornsey

Most single storey rear extensions in Crouch End and Hornsey fall within permitted development. Crouch End has a conservation area covering the central Broadway area and parts of the surrounding residential streets where planning permission is required. 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 Crouch End?

A wraparound extension in Crouch End costing £72,000 – £153,600 inc. VAT (£60,000 – £128,000 + VAT) typically adds £120,000 to £200,000 to the value of a Victorian terraced house — a return of 150 to 230 per cent. See our guide on how much value a house extension adds in London.

Areas Around Crouch End and Hornsey We Cover

LCCL Construction covers Crouch End N8, Hornsey N8, Harringay N4 N8, Stroud Green N4, Finsbury Park N4, Wood Green N22, Muswell Hill N10, Highgate N6, Archway N19, Tufnell Park N7, Islington N1 and all surrounding North London postcodes.

Frequently Asked Questions About House Extensions in Crouch End

How much does a house extension cost in Crouch End?

Costs range from £44,400 inc. VAT (£37,000 + VAT) for a small rear extension to £140,000 for a large double storey. A typical wraparound extension costs £72,000 – £153,600 inc. VAT (£60,000 – £128,000 + VAT).

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