Harrow Council (London Borough of Harrow)
Builders in Harrow
Housing stock, planning and conservation notes, and indicative costs for extensions, lofts and renovations in Harrow. Request quotes from independent local builders — Home Builders does not carry out building work.
Homes in Harrow
Harrow is largely suburban, with interwar semis, Metroland streets, and older housing around Harrow on the Hill.
Typical projects here
Side and rear extensions, hip-to-gable lofts and family-home renovations.
Services in Harrow
Planning and conservation in Harrow
Planning and building control in this area are handled by Harrow Council (London Borough of Harrow). Conservation areas include Harrow on the Hill; Green Belt sits on parts of the borough edge. Before you design, check whether your property is in a conservation area, is listed or is covered by an Article 4 direction; these change what you can build without permission. Our guide to permitted development in London explains the national rules, and loft conversion regulations covers roof works.
Many 1930s semis in Harrow are candidates for loft conversions under permitted development, subject to the usual checks.
Typical building costs in Harrow
Building costs in Harrow typically follow outer London rates of about £2,500 to £3,500 per m² for standard residential work, with high specifications and tricky access at the upper end or above. Budget on top for professional fees (about 15%), consents and contingency (8–15%) and VAT at 20% on extensions and renovations. These are indicative industry ranges for 2026, not a quote; see our London cost guide or request fixed quotes from local builders.
Neighbourhoods in Harrow
Questions about building in Harrow
Can I request quotes from builders in Harrow?
Yes. Quote requests are accepted from anywhere in Harrow, including Harrow on the Hill, Wealdstone, Pinner, Stanmore, Kenton, Rayners Lane, across London and the wider UK. With your consent, we pass your enquiry to up to 3 local builders who advertise with us.
Do I need planning permission for an extension in Harrow?
It depends on your property. Houses outside conservation areas may be able to use permitted development, while flats, conservation areas and Article 4 directions usually mean an application to Harrow Council (London Borough of Harrow). A Lawful Development Certificate gives certainty.
Should I check a builder’s insurance?
We ask every builder who advertises with us to provide proof of current public liability insurance before they are listed. Always check each builder’s insurance, references, written quote and trade body membership yourself before work starts.
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Request quotes for your Harrow project
Tell us about your extension, loft or renovation anywhere in the UK. With your consent, we pass your enquiry to up to 3 independent builders who advertise with us, so they can contact you with quotes. We do not carry out building work ourselves.
- Free to use, no obligation
- Up to 3 builders, only with your consent
- Always check each builder’s insurance, references and written quote