Heritage
restoration
in Hampstead, NW3

Hampstead was one of the first conservation areas created after the Town and Country Planning Act of 1968, and Camden's design guide counts nearly 500 listed buildings inside it. The same guide notes that its 19th century red and yellow brick houses keep many Arts and Crafts features: original windows and doors, decorative details, front gardens, boundary walls and railings.

Heritage restoration, for us, means repairing that fabric in matching materials and methods, and replacing only what cannot be saved. Our architects record the building first, our engineers diagnose what is structurally wrong, and work on site is sequenced so original material comes out only when there is no alternative.

Sources: Camden Council: Hampstead Conservation Area Design Guide (updated June 2026), Camden: Hampstead Conservation Area Design Guide (updated June 2026)

The guide is clear that historic windows and doors can last indefinitely if they are maintained, with occasional help from a joiner, and that repairing timber costs less in the long run than replacing it.

Where a window or door really is beyond repair, a replacement needs no planning permission if it matches the original in material, glazing bar pattern and profile, dimensions and way of opening, with the old catches, handles and pulleys moved across where possible.

Anything less exact on a front or street-facing elevation now needs planning permission, and so does double glazing a large-paned sash or casement, even in a form that copies the original.

Secondary glazing needs no permission; the guide asks only that its meeting rails line up with the glazing bars of the window behind.

Decorative glass should be kept and repaired with specialist advice, and removing or replacing it on a street-facing elevation needs permission that Camden will resist.

Where new joinery cannot be avoided, our bespoke joinery work starts from measured profiles of the surviving sashes, glazing bars and mouldings, so the new piece matches the old one in section as well as appearance.

Sources: Camden: Hampstead Conservation Area Design Guide (updated June 2026), Camden Council: Hampstead Conservation Area Design Guide (updated June 2026)

When a roof is refurbished, Camden asks for original keyhole ridge tiles and decorative chimney stacks and pots to be reused, and reinstated where they have been lost.

Where replacement cannot be avoided, the 2001 statement expects natural materials closely matching the original, and rules out concrete roof tiles, artificial slate and PVCu windows.

On a street-facing slope, changing the covering to a different material, stripping decorative ridge or hip tiles without replacing them, and altering a chimney all now need planning permission. Replacing roof coverings, like replacing windows and doors, may also need building regulations approval.

Routine care is part of restoration too. The statement names clearing gutters and rainwater pipes, mending damaged pointing, and painting and repairing wood and metalwork as the maintenance that prolongs a building's life, and Camden's guidance asks for original pipework and guttering to be repaired or reinstated like for like.

Bats can be a factor in old roofs. The Planning Portal says roof work may affect them, a survey may be required, and a licence may be needed where bats use the building.

Sources: Camden Planning Guidance: Home Improvements (January 2021), Camden Council: Hampstead Conservation Area Statement (2002), Camden: Hampstead Conservation Area Design Guide (updated June 2026), GOV.UK: Building regulations approval, Camden: Hampstead Conservation Area Statement (agreed 31 October 2001), Planning Portal: Loft conversion, protected species

Section 7 of the Planning (Listed Buildings and Conservation Areas) Act 1990 forbids demolishing a listed building, or altering or extending it in a way that affects its special character, unless the works are authorised.

Camden stresses that protection covers every part of the building, including the interior and later additions, and that working without consent is a criminal offence even if the owner did not realise the building was listed.

The dividing line is method. Camden's Hampstead guide says maintenance and like-for-like repair matching the original in every way needs no consent, but repairs using different materials or methods do, as do removing original parts, changing windows or external brickwork, and changing internal layouts.

Redecorating, or replacing kitchen and bathroom fittings, would not normally need consent; new fixings into the fabric, new service pipes, flues or vents would.

Camden would not normally approve the loss of historic parts, the obscuring of the original plan form, layout or structural integrity, or anything else that diminishes a listed building's historic value.

Within the Neighbourhood Plan area alone there are seven Grade I listed properties, among them Burgh House, Fenton House and Keats House, more than 20 at Grade II* and hundreds at Grade II.

Sources: Planning (Listed Buildings and Conservation Areas) Act 1990, section 7, Camden Council: Listed buildings, Camden: Hampstead Conservation Area Design Guide (updated June 2026), Hampstead Neighbourhood Plan 2025-2040 (adopted by Camden)

• A condition record elevation by elevation, with photographs and drawings, made before anything is opened up.
• Mortar, render and paint samples taken where the original make-up is uncertain, so repair materials are matched rather than guessed.
• Limited, targeted opening-up where hidden decay is suspected, followed by an engineer's assessment of timbers, lintels and chimney breasts.
• A schedule of repairs that separates like-for-like work from changes that need planning permission or listed building consent.
• Consent drawings and a heritage statement prepared by our architects where an application is needed, and a site sequence that protects retained fabric throughout.

Any application here must be accompanied by a heritage statement explaining what is significant about the building and its setting, and justifying any harm.

If you need an independent condition survey before committing to work, our sister practice, Hampstead Chartered Surveyors & Building Consultancy, provides one; see our surveying support page.

Source: Camden Council: Conservation areas