Architectural drawings in Orpington

Orpington sits within Bromley, so applications are decided by Bromley Council. Most single-storey rear extensions and side-returns on terraced or semi-detached homes in Orpington fall under Permitted Development — up to 3m deep (attached) or 4m (detached), under 4m high. Flats, listed buildings and conservation areas always require full planning. Article 4 status here: No. We check eligibility free at the site visit.

Orpington is characterised by 1930s semi-detached, post-war. The dominant stock is 1930s semi-detached. We've drawn extensions and lofts for every period represented here — Victorian rear additions, Edwardian side returns, 1930s wrap-arounds, and contemporary infill where the streetscape allows.

Bromley Council statutory determination is 8 weeks for householder applications. Validation typically adds 1–2 weeks. From your first call to a decision, expect 12–14 weeks total: 1 week measured survey, 2 weeks design, 1–2 weeks validation, 8 weeks determination. We've achieved a 98% first-time approval rate across Bromley.

Loft conversion drawings in Orpington start at £1,225 for planning + building regs combined. Construction cost (separate from drawings) is £45,000–£75,000 for a standard rear dormer on a Victorian or Edwardian terrace, £65,000–£95,000 for a hip-to-gable plus dormer. We quote drawings as a fixed fee — no hourly creep.

Bromley has 48 designated conservation areas. Nearest to Orpington: Bromley Town. In a conservation area, full planning is required for most external work (including roof additions, rendering, replacement windows). We prepare a Heritage Statement covering the conservation area's character appraisal.