# Builders in Pinner

Canonical URL: https://mirion.uk/areas/harrow/pinner/

> Loft conversions, extensions and renovations in Pinner, HA5, for 1930s semis, detached houses and period cottages, with Pinner's conservation areas explained.

We build loft conversions, rear and side extensions and renovations in Pinner, where an old village centre is surrounded by the 1920s and 1930s garden estates that grew up around the Metropolitan line.

Pinner is older than most of Metro-land. Its parish church was consecrated in 1321, and East End Farm Cottage dates from the late fifteenth century. The village then grew rapidly between 1923 and 1939, when a series of garden estates, including Pinnerwood Park, spread out around the historic core, and many houses were built in the 1930s Art Deco style.

Today Pinner is one of Harrow's most house-dominated areas. At the 2021 Census, 70% of households in Pinner Central, Pinner South and Pinner Green lived in a house, with 28% in detached houses and 33% in semi-detached houses. Median semi-detached prices in those areas ranged from about £720,000 to £875,000 in the year to March 2026.

That combination of large interwar houses and generous gardens makes Pinner well suited to two-storey side extensions, deeper single-storey rear extensions and loft conversions. On the older cottages around the High Street and Waxwell Lane, projects are smaller and the emphasis is on repair and sympathetic alterations.

Pinner has more conservation areas than anywhere else in Harrow. The council's Pinner Conservation Areas SPD covers Pinner High Street, Waxwell Lane, Waxwell Close, Moss Lane, East End Farm, West Towers, Tookes Green, Pinnerwood Park Estate, Pinnerwood Farm, Pinner Hill Estate, Rayners Lane, Pinner Road and part of Eastcote Village, each with its own appraisal and management strategy. Pinnerwood Park Estate also has an Article 4 guidance note and a driveway design guide.

Outside those areas, Harrow's Residential Design Guide applies. For a semi-detached house, it prefers a hip-to-gable loft with a rear dormer set in from the party wall and the gable and set back from the eaves. For a detached house, it discourages gabling a hipped roof and suggests rear and side dormers instead. That distinction matters in Pinner, where so many homes are detached.

Building work in Pinner: common questions

Is my Pinner house in a conservation area?

Possibly. Pinner has around a dozen conservation areas, from Pinner High Street and Waxwell Lane to the Pinnerwood Park and Pinner Hill estates. Harrow's online conservation area finder checks your postcode, and the council's maps show any Article 4 directions.

Can I convert the hipped roof of a detached house in Pinner to a gable?

Harrow's Residential Design Guide says gabling the hipped roof of a detached house can be unduly prominent and should be avoided, and suggests side and rear dormers instead. If the house keeps its permitted development rights, a hip-to-gable may still be possible without an application, so we check that first.

- Local planning authority: London Borough of Harrow
- Postcode districts: HA5
- Work Mirion has carried out here: Extensions, loft conversions and renovations