North London houses we know
North London has the widest mix of building stock in the catchment. Highgate Village has Georgian and Regency houses (some Grade II listed) on a steep hill. Camden and Islington are Georgian and early Victorian terraces, often four storeys with basements. Holloway is mostly Victorian terrace. Wood Green is later Victorian and Edwardian semi-detached. Winchmore Hill is inter-war Tudorbethan and 1930s detached. Each requires a different approach to extension, loft conversion and basement work.
Conservation areas in North London
We have worked inside Highgate conservation area, Camden Square conservation area, Primrose Hill conservation area, Barnsbury and Canonbury conservation areas in Islington, and Wood Green conservation area. Each council (Camden, Islington, Haringey, Enfield) has its own design guidance and we match the specification to the local document at the planning stage.
Loft conversions in North London
L-shape mansards are the dominant loft conversion type on Victorian terraces in Holloway, Camden and Islington. Hip-to-gable conversions are more common on the Edwardian and inter-war stock in Wood Green and Winchmore Hill. Highgate listed property typically requires planning consent for any roof alteration and most loft conversions there are internal-only with Velux roof glazing rather than dormer or mansard.
Council building control
North London building control submissions go to Camden, Islington, Haringey, Enfield, Barnet, or Hackney councils depending on postcode. We submit and attend all inspections.
Loft conversions in North London
Loft conversion in North London depends heavily on the building stock. Victorian terraces in Camden, Islington and Holloway typically take L-shape mansards (planning permission required, £65,000 to £95,000). Edwardian and inter-war semis in Wood Green, Winchmore Hill and Crouch End take hip-to-gable with rear dormer (typically permitted development, £55,000 to £80,000). Highgate Village listed property is typically Velux-only because dormer and mansard work is rarely consented under listed building consent.
House extensions in Winchmore Hill, Wood Green and East Finchley typically use rear extensions rather than side-returns because the wider Edwardian footprint already covers the side alley. For type comparisons and London pricing see the loft conversion page.
House extensions in North London
House extensions in Winchmore Hill, Wood Green, Crouch End and East Finchley typically use rear and side-return formats. Camden and Islington Victorian terraces use side-returns; Highgate work is constrained by listing and conservation area policies. A typical rear extension in Winchmore Hill or Wood Green runs £55,000 to £90,000 and 10 to 14 weeks on site. Wrap-arounds in Islington and Camden run £90,000 to £150,000.
For the difference between permitted development and full planning permission see the house extension service page. Building control in North London goes to Camden, Islington, Haringey, Enfield or Barnet councils depending on postcode.
Full refurbishments in North London
A full refurbishment of a North London 4-bed Victorian terrace in Holloway or Camden runs £250,000 to £520,000 in 2026 prices. Inter-war Tudorbethan houses in Winchmore Hill and East Finchley typically run £200,000 to £420,000. Listed property in Highgate Village starts at £400,000 and is priced per square metre once the listing description and conservation officer requirements are clear. See our refurbishment service page for the full scope and listed building restoration page for heritage work.
Recent projects in this area
Project in North London?
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