A rear extension is the most common way homes gain space, and the rules around it are precise: permitted development allows 3 metres of depth on an attached house and 4 on a detached one, with larger schemes possible through prior approval.
- Permitted development or planning route, confirmed in writing
- Design options and drawings to consent standard
- Structural coordination and building regulations package
- Tender and construction support to completion
Do I need planning permission for a rear extension? +
Often not: many fall under permitted development. We check your property's planning history, conservation status and permitted development position as part of the free consultation.
How long does a rear extension take? +
Typically 3 to 5 months for design and consent, 4 to 8 weeks of technical design, and 3 to 5 months on site. You receive a written programme at the start.
