What we build in Plumstead
Most Plumstead projects we scope fall into three buckets: a side-return or rear infill that fixes a dark galley kitchen, a full-width rear extension that opens the ground floor to the garden, and a rear-plus-loft package that adds a bedroom while the scaffold is already up. Georgian terraces (Greenwich), 1930s semis (Eltham), post-war and new-build (Kidbrooke).
Extension costs in Plumstead
A mid-spec 25 m² extension in Plumstead typically lands between £102,000 and £157,000 all-in — that figure includes professional fees, planning and Building Control, party wall, a 12% contingency and VAT at 20%. Ex-VAT build rates run £2750–£4200 per m² depending on glazing, structural spans and kitchen spend.
| Project | Size | Plumstead all-in |
|---|---|---|
| Side return infill | 15–20 m² | £77k – £118k |
| Full-width rear | 20–30 m² | £102k – £157k |
| Wraparound | 30–45 m² | £148k – £228k |
| Double-storey rear | 40–60 m² | £199k – £306k |
Planning permission in Plumstead
Greenwich West is a UNESCO World Heritage buffer — design controls are very tight. Elsewhere the borough is fairly permissive.
Before you assume permitted development applies to your street, check whether your street falls inside a conservation area or an Article 4 direction — both are common in Greenwich and both remove PD rights for rear and side extensions. Our London planning guide walks through the tests in order.
Party wall and neighbours
Semi-detached prevalent in Eltham; typically one party wall.
Serve notice at least two months before you break ground. Budget £1,200–£2,400 per adjoining owner if they dissent and appoint their own surveyor — see the Party Wall Act guide.
Access, logistics and site set-up
Rear access via a side alley or garden gate speeds up muck-away and cuts labour cost noticeably.
Every quote we issue for Plumstead prices skip permits, parking suspensions, protection and welfare explicitly in the preliminaries — so the number you sign is the number you pay.
Value added in Plumstead
Well-executed extensions here tend to return a healthy share of their cost at resale, particularly where they add a genuine third or fourth bedroom.
Typical programme
- Weeks 0–4Measured survey, design and structural calcs
- Weeks 4–12Planning or lawful development certificate, party wall notices
- Weeks 12–16Tender, builder selection and contract signing
- Weeks 16–34On site: groundworks, shell, watertight, first and second fix
- Week 35Building Control sign-off, snagging and handover
Full detail in the London extension timeline guide.
Why homeowners in Plumstead use us
- KYB-verified builders only
- Live Greenwich project experience
- Itemised fixed-price specifications
- Insurance, warranty and accreditation checks