Areas we cover
Builders inHarpenden.
Harpenden's Thameslink service reaches St Pancras in around 25 minutes, and the town's housing stock matches the commuter profile: substantial Edwardian and interwar detached houses flanking the High Street and the common, with Victorian terraces tightly packed closer to the station in AL5. That combination of plot size and property age makes AL5 one of the more active rear-extension and loft-conversion postcodes in Hertfordshire. PrimeCraft Surface Solutions regularly takes on full-width rear extensions that reshape the entire ground floor into an open kitchen-dining-living space, often alongside a loft conversion adding a principal suite above. Both St Albans and Harpenden fall under St Albans City and District Council's planning jurisdiction, so permitted development rules are consistent across AL3 and AL5. We are fully insured and deliver an itemised quote on the same day as the site visit.
Postcodes: AL5
Local work, in depth
What we build in Harpenden
House extensions in Harpenden
AL5's detached and semi-detached plots give an extension room to be ambitious — full-width rear additions, wraparounds that square off an L-shaped plan, and two-storey builds that add a bedroom above the new kitchen. The design conversation in Harpenden is usually about proportion rather than possibility: keeping the addition subordinate to a good Edwardian house, matching brick and roof pitch, and putting the glazing where the garden justifies it. We design, gain the consents and build under one contract.
Kitchens for family houses
The extended Harpenden house earns a kitchen designed for how the family actually lives — a working wall of appliances, an island that seats four for breakfast, and utility and boot-room space carved out beside it. We fit bespoke and premium ranges alike, and the same trades handle flooring, decoration and the finishing joinery so the room completes as one piece.
Period work near the common
The Victorian villas and cottages around Harpenden Common carry original sashes, joinery and plasterwork that deserve repair rather than replacement. Our restoration trades work in lime and timber to match what exists, and redecoration is specified breathable where the fabric needs it.
Nearby areas we also cover
FAQ
Commonquestions, Harpenden.
- A full-width single-storey rear extension on an Edwardian or interwar detached house in AL5 — covering the structural shell, groundworks, roof, glazing and a fully fitted kitchen — typically runs between £75,000 and £145,000. The depth and total footprint of the extension, the roof treatment (flat with rooflights, lantern, or pitched), and the kitchen specification are the biggest variables. Two-storey or wrap-around additions sit above that range. We present the build structure and the kitchen fit-out as separate cost lines on the quote so the split is transparent before you decide.
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