House Extensions Enfield 2026: Complete Guide to Costs, Planning and Types

Enfield is one of North London's most active areas for house extensions. The London Borough of Enfield encompasses a wide range of property types across areas including Enfield Town EN1, Enfield Chase EN2, Grange Park N21, Winchmore Hill N21, Palmers Green N13, Southgate N14, Oakwood N14, Cockfosters EN4, Crews Hill EN2 and Bush Hill Park EN1. The mix of Edwardian, inter-war and post-war semi-detached and detached houses across the borough offers excellent opportunities for loft conversions, house extensions and renovations. LCCL Construction delivers house extensions across all of Enfield as part of our complete design and build service.

LCCL Construction — specialist house extension builders across the London Borough of Enfield

House Extensions Enfield: Best Types for Local Properties

The best house extension type for an Enfield property depends on the property style, plot size and planning situation. The large inter-war and Edwardian semi-detached houses across Grange Park, Winchmore Hill, Southgate and Palmers Green are well suited to rear extensions, wraparound extensions and double storey rear extensions. The more generous plot sizes across Enfield Chase, Cockfosters and Crews Hill allow larger extensions and even new outbuildings. Victorian terraced houses in Enfield Town suit rear extensions and side return extensions.

How Much Do House Extensions Cost in Enfield in 2026?

House extension costs in Enfield are broadly in line with North London averages.

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

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

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

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

All costs include architectural design, planning permission, building regulations, structural calculations, party wall agreements, construction, electrics, plumbing, plastering and decoration.

Planning Permission for House Extensions in Enfield

Most single storey rear extensions in Enfield fall within permitted development rights and do not require planning permission. However the London Borough of Enfield has several conservation areas including the Grange Park Conservation Area, Winchmore Hill Conservation Area, Southgate Conservation Area and Enfield Town Conservation Area where planning permission is always required. Properties in the Green Belt areas of Enfield Chase also have additional planning restrictions. LCCL Construction checks all planning requirements as part of our free initial consultation.

Why Choose LCCL Construction for House Extensions in Enfield?

LCCL Construction is based in Finchley N3, just a short distance from the London Borough of Enfield. We have delivered house extensions and loft conversions across all areas of Enfield for over 20 years. 200+ verified reviews at 4.7/5. LABC Award Winners 2024. LABC Registered Partners. NFB members. One company, one estimate, one point of contact from design to completion.

Areas of Enfield We Cover

LCCL Construction covers all areas of the London Borough of Enfield including Enfield Town EN1, Enfield Chase EN2, Grange Park N21, Winchmore Hill N21, Palmers Green N13, Southgate N14, Oakwood N14, Cockfosters EN4, Bush Hill Park EN1, Crews Hill EN2, Ponders End EN3, Enfield Highway EN3, Cheshunt EN8 and all surrounding postcodes.

Frequently Asked Questions About House Extensions in Enfield

How much does a house extension cost in Enfield?

Costs range from £44,400 inc. VAT (£37,000 + VAT) for a small single storey rear extension to £140,000 for a large double storey extension with high specification finishes. A typical rear extension costs £42,000 – £90,000 inc. VAT (£35,000 – £75,000 + VAT).

Does LCCL Construction cover all of Enfield?

Yes — LCCL Construction covers every area of the London Borough of Enfield from Enfield Town EN1 to Cockfosters EN4 and all surrounding areas.

To get a free consultation and estimate for your Enfield extension call 020 8037 7332 or get an instant quote online.