Two-storey rear extension in Petts Wood

Which Petts Wood postcodes does this house extensions service cover?

Every Petts Wood postcode district we draw in, the stock that dominates it and the authority that validates a house extensions there. Petts Wood fees below are the statutory England rates for 2026, not house extensions estimates.

What changes about a house extensions in each part of Petts Wood?

Roof pitch, wall build-up and plot depth change every few Petts Wood streets, and each one changes what a house extensions can achieve at that address.

• Petts Wood (BR5) — 1930s semi-detached, garden suburb defines Petts Wood, where 1930s semi-detached set what a house extensions can do. 1930s semis here have the deepest rear gardens in the area across BR5. Any Petts Wood house extensions is validated by Bromley Council, with Petts Wood station the usual Petts Wood reference point on the site plan.
• Near Petts Wood: Bickley (BR1) — 1930s detached, conservation defines Bickley, where 1930s detached, edwardian villas set what a house extensions can do. Edwardian plots here are wider across BR1. Any Bickley house extensions is validated by Bromley Council, with Bickley station the usual Bickley reference point on the site plan.
• Near Petts Wood: Orpington (BR5, BR6) — house extensions work in Orpington means 1930s semi-detached. Orpington is 1930s semi-detached, post-war. 1930s semis here have the deepest rear gardens in the area throughout BR5. Bromley Council decides the Orpington application, and Orpington High Street anchors the Orpington location plan.
• Near Petts Wood: West Wickham (BR4) — 1930s semi-detached defines West Wickham, where 1930s semi-detached set what a house extensions can do. 1930s semis here have the deepest rear gardens in the area across BR4. Any West Wickham house extensions is validated by Bromley Council, with West Wickham station the usual West Wickham reference point on the site plan.
• Near Petts Wood: Biggin Hill (TN16) — a house extensions in Biggin Hill starts from 1930s semi-detached, and Biggin Hill reads as 1930s semi-detached, rural fringe. 1930s semis here have the deepest rear gardens in the area in TN16. Bromley Council assesses Biggin Hill house extensions against its own Biggin Hill character guidance, and the location plan we draw for Biggin Hill references Biggin Hill Airport.
• Near Petts Wood: Keston (BR2) — Edwardian and 1930s village defines Keston, where edwardian villas, 1930s semi-detached set what a house extensions can do. Edwardian plots here are wider across BR2. Any Keston house extensions is validated by Bromley Council, with Keston Ponds the usual Keston reference point on the site plan.
• Near Petts Wood: Penge (SE20) — house extensions work in Penge means victorian and edwardian terraces. Penge is Victorian and Edwardian terraces. The side-return infill is the classic move on these Victorian terraces — 3 m of permitted development depth plus the width of the original side passage throughout SE20. Bromley Council decides the Penge application, and Penge East station anchors the Penge location plan.

Does Petts Wood planning policy restrict a house extensions?

Conservation areas covering Petts Wood: Bromley Council runs 48, and Chislehurst, Beckenham, Keston are the ones Petts Wood owners meet most. A house extensions inside a Petts Wood conservation area loses permitted development, so the Petts Wood submission is a householder application at £548 decided in 8 weeks — not a £249 prior approval decided in 6 weeks. In Keston a house extensions is judged on the street elevation first.

No blanket Article 4 over Petts Wood: Bromley Council has not withdrawn permitted development across Petts Wood, so a house extensions outside a Petts Wood conservation area usually keeps it. The £274 Lawful Development Certificate is still the document a BR5 owner wants on file.

What Petts Wood is built from: Large 1930s detached and semi-detached in Chislehurst and Bickley; Edwardian in Beckenham; Victorian in Bromley town; Metropolitan Green Belt covers significant rural-fringe land. Largest London borough by area; substantial Green Belt; conservation areas in most town centres; generally permissive elsewhere. That mix decides the house extensions route in Petts Wood more than the postcode does.

Who decides a house extensions on the edge of Petts Wood?

• Lewisham — adjoining Petts Wood, with 30 conservation areas centred on SE3. A house extensions on the far side of the Petts Wood line is determined by Lewisham Council, so the Petts Wood quote for house extensions is checked against Lewisham guidance before it is issued.
• Greenwich — cross the Petts Wood boundary and Greenwich Council takes the house extensions instead, applying 20 conservation areas of its own around SE3. We re-price house extensions at the Petts Wood edge because Greenwich policy and Bromley policy rarely align on house extensions depth.
• Bexley — adjoining Petts Wood, with 16 conservation areas centred on DA1. A house extensions on the far side of the Petts Wood line is determined by Bexley Council, so the Petts Wood quote for house extensions is checked against Bexley guidance before it is issued.
• Croydon — adjoining Petts Wood, with 24 conservation areas centred on CR0. A house extensions on the far side of the Petts Wood line is determined by Croydon Council, so the Petts Wood quote for house extensions is checked against Croydon guidance before it is issued.

Sources for this Petts Wood house extensions page: borough policies maps and conservation-area registers (2025–26), Royal Mail postcode district boundaries, the Town and Country Planning (Fees for Applications) (England) Regulations, the Town and Country Planning (General Permitted Development) (England) Order 2015 as amended, and the Party Wall etc. Act 1996.