Premium Builders in Highgate
Bespoke luxury extensions, exquisite renovations and meticulously crafted loft conversions for Highgate's grand period properties.
Builders in Highgate, N6
Highgate stands as one of North London's most prestigious addresses, where grand Victorian and Edwardian villas line the area's leafy, tree-shaded avenues. The neighbourhood's exceptional architectural heritage, proximity to Hampstead Heath and Highgate Wood, and its distinguished village atmosphere make it a coveted enclave for discerning homeowners seeking premium living. Alstruct Ltd brings a bespoke approach to every construction project in this corner of North London, where Haringey, Camden and Islington councils meet, delivering exquisite results that honour each property's unique character.
The substantial period properties found throughout Highgate — from the imposing detached villas of The Grove and Bishopswood Road to the elegant terraces of Highgate West Hill — present extraordinary opportunities for luxury transformation. Whether you envision a contemporary rear extension seamlessly blending with original Victorian brickwork, a meticulously crafted loft conversion creating a sumptuous master suite, or a comprehensive whole-house renovation that elevates every room to the highest specification, Alstruct possesses the expertise and craftsmanship to realise your vision.
With Highgate station on the Northern line providing swift access to central London, the area continues to attract affluent professionals and families investing significantly in their properties. Alstruct understands the planning requirements of Haringey and Camden councils, including the controls that apply in their two Highgate conservation areas. Our project managers and design team, working with your architect or ours, take each project from the first drawings through to completion.
Why Choose Alstruct in Highgate?
- Specialists in luxury renovations for grand Victorian and Edwardian villas
- Extensive experience with Haringey Council planning and Highgate Conservation Area
- CHAS Elite, Constructionline Gold & Federation of Master Builders certified
- Complimentary site survey with detailed, transparent quotation
- Dedicated project manager from initial consultation to final handover
- Our design team, working with your architect or ours
- Premium materials sourced from leading suppliers
- Proven portfolio of high-end projects across North London
Premium construction contractors covering Highgate
Extensions in Highgate
Bespoke rear, side and wraparound extensions for Highgate's grand villas. Premium materials and exquisite detailing that complement period architecture.
Learn more →Loft Conversions in Highgate
Meticulously crafted dormer, mansard and hip-to-gable conversions transforming generous roof spaces into luxurious master suites and living areas.
Learn more →Renovations in Highgate
Complete whole-house renovations restoring and enhancing Highgate's Victorian and Edwardian properties with premium finishes and contemporary luxury.
Learn more →Basement Conversions in Highgate
Expert basement excavation and conversion creating additional luxury living space beneath Highgate's substantial period properties.
Learn more →Groundworks in Highgate
Professional foundations, drainage solutions and site preparation engineered to the highest standards for Highgate construction projects.
Learn more →Landscaping in Highgate
Exquisite hard landscaping including premium driveways, elegant patios and bespoke garden designs that complete your Highgate property transformation.
Learn more →House and kitchen extensions in Highgate
Highgate is Georgian village houses around Pond Square and the High Street, Victorian villas on the slopes, and the Holly Lodge Estate's 1920s houses towards Dartmouth Park. Rear and lower-ground extensions are the common Highgate projects, plus orangery-style additions to the villas; the hillside plots often allow a lower-ground family room.
Budget guidance for Highgate: expect £2,500–£4,000 per m² for a single-storey extension, which puts a 25–30 m² kitchen extension at £75,000–£120,000; two-storey and wraparound schemes are priced on the structure involved (see our house extension cost guide). Highgate is covered by two neighbouring conservation areas, one in Haringey and one in Camden, with the Holly Lodge Estate a separate Camden conservation area and listed buildings around the village. Where approval from Haringey or Camden Council is needed, depending on the street, our design team, working with your architect or ours, prepares and submits the application.
Planning a kitchen extension? See our kitchen extensions page for layouts, glazing and costs.
Loft conversions in Highgate
Highgate's Victorian villas have the roof volume for a two-room conversion; the Holly Lodge houses take a rear dormer, and the village houses need a conservation-led design.
Typical London figures are £25,000–£45,000 for a Velux conversion, £45,000–£75,000 for a dormer and £60,000–£100,000+ for a mansard (details in our loft conversion cost guide). Every Highgate loft quote follows a measured survey of the roof, head height and stair position, and includes Building Regulations sign-off, fire doors and structural calculations.
Renovations and refurbishment in Highgate
Highgate renovations are full refurbishments of period houses and large flats with bespoke joinery and restored period detail. Typical Highgate refurbishments include structural openings with steel beams, new kitchens and bathrooms, rewiring, heating and period repairs such as sash windows, cornices and floors. Budgets are set out in our renovation cost guide; in Highgate, as everywhere, we work to a JCT contract, a written specification and a 10-year workmanship warranty.
Guides for homes in Highgate
For the period townhouses, mews and conservation areas of Highgate, our most useful guides are mansard loft conversion costs, basement conversion costs, extending in a conservation area, leaking lead roof valleys and damp basements and tanking.
Planning approvals in Highgate
Haringey Council approved 90.3% of householder planning applications decided between September 2025 and August 2026, against a London average of 85.8%; a typical decision took about 8.0 weeks from validation. Loft conversions that needed planning permission were approved 88.7% of the time and extensions 92.3%.
Some Highgate streets fall under Camden Council instead, where the approval rate was 87.6%.
See how every London borough compares, including loft and extension approval rates, in our 2026 London planning approvals study.
Alstruct projects near Highgate
Archway Victorian Terrace, N19
Full Victorian terrace renovation and rear extension with triple glazing and aluminium sliding doors.
View project →Golders Green 1930s Semi, NW11
Rear extension, two-storey side extension and full renovation of a 1930s semi-detached house.
View project →Finchley Two-Storey Bay, N3
A two-storey front bay rebuilt from cill level with load-bearing posts and a welded steel ring beam.
View project →Beyond the projects above, we have recent and current sites in N6, NW8, NW6, W11 and E5 within about five miles of Highgate, and we work across every London borough from our office in South Woodford, E18. See all completed projects →
Common questions about building in Highgate
Do I need planning permission for an extension in Highgate?
Houses, not flats, keep national permitted development rights for a single-storey rear extension (3m attached, 4m detached, or 6m and 8m through prior approval) and most rear dormers within 40 or 50 cubic metres. Highgate is split: the north side of the High Street and the Archway Road side are Haringey, the south side around Pond Square and Holly Lodge is Camden, and Highgate Hill/Hornsey Lane is Islington. Conservation areas include Highgate (Haringey and Camden), Holly Lodge Estate and Dartmouth Park. They keep single-storey rear rights but remove side extensions, two-storey rear extensions, cladding and roof additions. Neither Highgate conservation area has an Article 4 direction.
What do the councils expect for loft conversions in Highgate?
It depends on the side of the street. On the Haringey side, the Highgate Conservation Area Appraisal and Management Plan (December 2013) says front dormers should be avoided where they are not part of the street's character, and rear dormers need care where they can be seen from nearby streets. On the Camden side, Camden Planning Guidance: Home Improvements asks for dormers that are subordinate to the roof slope, prefers a traditional mansard on traditional buildings, and rarely supports front dormers on an unbroken roofscape.
What does a basement or lower-ground conversion cost in Highgate?
Highgate's hillside villas often have a cellar or a lower ground floor. Converting an existing cellar typically costs £2,500–£4,000 per m², about £80,000–£150,000 for 30–40 m², and a full excavation £4,500–£6,500 per m², all excluding VAT. On the Camden side any basement needs planning permission, and Haringey's Policy DM18 asks for a Basement Impact Assessment. Our basement conversion cost guide explains the figures.
Which Alstruct projects are nearest to Highgate?
The closest is Archway Victorian Terrace, N19, about 0.6 miles away: a full Victorian terrace renovation and rear extension with triple glazing and aluminium sliding doors. Golders Green 1930s Semi, NW11, about 2.3 miles away, combined a rear extension, a two-storey side extension and a full renovation of a 1930s semi. Finchley Two-Storey Bay, N3, about 2.8 miles away, involved rebuilding a two-storey front bay from cill level with load-bearing posts and a welded steel ring beam.
Which parts of Highgate do you cover?
We cover the N6 district: Highgate Village, Pond Square and the High Street, Highgate West Hill, the Holly Lodge Estate and the villas on the slopes towards Dartmouth Park. Depending on the street, the council is Haringey, Camden or Islington. We work from South Woodford E18, about 8 miles away. We also have pages for Hampstead, Muswell Hill and Crouch End.
Nearby areas we cover
Alstruct works across every London borough. Here are areas close to Highgate with dedicated local pages: