Builders in Bromley

Bromley's character is defined by its 1930s semi-detached houses, built during the suburban expansion between the wars. These properties have solid brick construction, hipped roofs, and front and rear gardens that offer excellent scope for extension work.

Rear extensions are the bread-and-butter project for Bromley builders. The generous rear gardens mean that single-storey extensions can be substantial — 4 to 6 metres deep — without overwhelming the plot. Most fall under permitted development, and Bromley Council's supplementary planning guidance for extensions is clearly written and straightforward to follow.

Loft conversions in Bromley's semis typically involve a hip-to-gable conversion with a rear dormer, converting the hipped roof into a full gable to maximise headroom and usable space. This is a tried-and-tested approach that works well with the 1930s roof structure, though a structural engineer must confirm the existing timbers can support the conversion.

Garage conversions are particularly popular in Bromley, where many properties have integral or attached garages that are underused. Converting a garage to a home office, playroom, or additional reception room is one of the most cost-effective ways to add usable space, typically costing £10,000–£18,000.

The Rookery conservation area near the town centre and period properties on some of the older roads require more careful treatment, but the majority of Bromley's residential streets are free from conservation restrictions. This makes the planning process more predictable.

Build costs in Bromley are among the more competitive in our coverage area, reflecting the suburban location and good access for deliveries and construction vehicles. Wide driveways and front gardens simplify logistics compared to inner-London terraces with no off-street parking.

Content verified by the South London Trades editorial team — last updated March 2026