House Extensions · DA7 Bexleyheath
Bexley applies standard suburban householder control across DA7, a settled inter-war family market with no conservation constraints.
If your property sits elsewhere in the borough, the borough-wide page for house extensions in Bexley covers the same service across every ward.
House extensions in Bexleyheath are dominated by single-storey rear and side-return additions on DA7's inter-war bay-fronted semis and terraces around bexleyheath, with double-storey and wrap-around schemes where the plot allows. Bexley Council weighs depth, height and neighbour daylight; many extensions across Bexleyheath, Barnehurst, Crook Log, Northumberland Heath fringe are Permitted Development, which we confirm with a Lawful Development Certificate before you build.
The whole spectrum — rear extensions, side returns, wraparounds, double-storey, basement digs. Planning-led design with detailed technical phase, ideal for inter-war bay-fronted semis and terraces around bexleyheath typical of Bexleyheath.
Across Bexleyheath, Barnehurst, Crook Log, Northumberland Heath fringe in DA7, the dominant property is inter-war bay-fronted semis and terraces around bexleyheath and barnehurst, with post-war infill. That stock shapes what house extension drawings looks like here: the right approach for a period terrace differs from a mansion-block flat or a new-build, and Bexley Council judges each on design quality and neighbour impact. We survey the specific Bexleyheath property, confirm the planning route — Permitted Development, a Lawful Development Certificate, or full planning — and draw a council-ready set tailored to the DA7 streetscape.
Housing stock in DA7: Inter-war bay-fronted semis and terraces around Bexleyheath and Barnehurst, with post-war infill.
Within the district: Bexleyheath, Barnehurst, Crook Log, Northumberland Heath fringe.
Streets we know in DA7: the Barnehurst estate roads, the Crook Log streets and the inter-war terraces around Erith Road. Each road has its own building line, boundary treatment and precedent that Bexley Council weighs when assessing a house extension drawings scheme.
Getting around DA7: Barnehurst and Bexleyheath into London Bridge and Cannon Street.
Property values: Bexley's 2025 medians by type — £415,000 terraced across 911 sales, £500,000 semi-detached across 1,193 — bracket the DA7 all-property median of £480,000. Source: HM Land Registry Price Paid Data.
Borough character: Outer south-east London suburban; very permissive planning environment; strong PD uptake for extensions and loft conversions.
Measured existing survey, photographic record, Article 4 and conservation check specific to Bexleyheath before we quote.
2–3 design options at concept stage — alternative layouts, glazing, roof forms.
Site location plan, existing and proposed plans, elevations, sections, D&AS where required.
Part L thermal, Part B fire, Part M accessibility, structural strategy.
Steel beam, foundation, lintel design. Chartered engineer sign-off.
Party Wall notices where needed; Thames Water Build Over Agreement where within 3m of a public sewer.
Single planning or building-regs submission.
Planning + building regs + structural.
Listed, conservation or complex sites.
Because DA7 is a settled family suburb of inter-war bay-fronted semis around Barnehurst and Bexleyheath — ideal for rear and side extensions and hip-to-gable loft conversions. With no conservation constraints, much of the work runs on the Permitted Development route, confirmed with a Lawful Development Certificate.
Usually yes on the semis — a hip-to-gable plus rear dormer within the 50 cubic metre volume allowance, confirmed by a Lawful Development Certificate. We check the roof head height and draw the scheme for Building Control too, which is essential for the new floor and stair.
Often, on the wider semi plots — a wrap-around ground-floor extension or a two-storey side addition, subject to Bexley's design and neighbour-amenity policy on the 45-degree test. We design within those limits and produce the planning and Building Regulations drawings together.
DA7 offers strong value.
Bexley Council charges its own statutory application fee (currently £548 for a householder planning application, £610 for a full application). We quote the drawings as one fixed price and the free site survey covers every DA7 address.
For a DA7 project across Bexleyheath, Barnehurst, Crook Log, Northumberland Heath fringe, expect roughly 3–4 weeks from instruction to submission: week 1 the measured survey, weeks 2–3 the drawings and your revisions, then validation and the statutory determination by Bexley Council (8 weeks for a householder application). We carry the Bexleyheath application through every officer query to the decision.
Bexleyheath (DA7) sits primarily in Bexley, so applications are decided by Bexley Council. We confirm the planning route for your exact address before quoting.
Almost always. Any structural work behind house extension drawings in Bexleyheath — new openings, steel beams, loft floors, foundations — needs Building Regulations approval covering structure (Part A), fire escape (Part B) and insulation (Part L), submitted to Bexley Council Building Control or an approved inspector. On DA7's typically terraced and semi-detached stock, a Party Wall notice to adjoining neighbours is normally required before the steelwork. We coordinate both as part of the Complete package.
In value terms, yes. The bigger risk is an unapproved or non-compliant scheme — which is why council-ready drawings and a clean Building Control sign-off matter on DA7 homes.
If your site sits close to the edge of the borough, it is worth checking the authority next door. Browse everything we do in DA5, DA6 and DA15.
Pick a slot that suits you. No obligation and no sales pressure, just straight answers on your planning route.
Every DA7 postcode district we draw in, the stock that dominates it and the authority that validates a house extension there. DA7 fees below are the statutory England rates for 2026, not house extension estimates.
| Postcode | Area | Dominant stock | What it means for a house extension |
|---|---|---|---|
| DA7 | Bexleyheath / Barnehurst | 1930s semi-detached | Bexleyheath / Barnehurst sits wholly inside DA7, so Bexley Council validates every house extension submitted from an DA7 address. |
| DA7 | Bexleyheath | 1930s semi-detached | Bexleyheath sits inside DA7; house extension proposals here are determined by Bexley Council. |
| DA7 | Barnehurst | 1930s semi-detached | Barnehurst sits inside DA7; house extension proposals here are determined by Bexley Council. |
| DA1 | Crayford / Dartford fringe | Victorian terraces, 1930s semi-detached | Adjoining district to DA7, also inside Bexley for house extension purposes. |
| DA5 | Old Bexley | Georgian villas, Victorian cottages | Adjoining district to DA7, also inside Bexley for house extension purposes. |
Roof pitch, wall build-up and plot depth change every few DA7 streets, and each one changes what a house extension can achieve at that address.
How designation changes a DA7 (Bexleyheath / Barnehurst) house extension: Bexley Council maintains 16 conservation areas, including Crayford, Welling, Bexley Village. Inside any of them a DA7 (Bexleyheath / Barnehurst) house extension cannot rely on permitted development, and the route becomes a £548 householder application determined in 8 weeks rather than a £249 prior approval in 6 weeks. Bexley Village sets the tone for DA7 (Bexleyheath / Barnehurst) casework.
No blanket Article 4 over DA7 (Bexleyheath / Barnehurst): Bexley Council has not withdrawn permitted development across DA7 (Bexleyheath / Barnehurst), so a house extension outside a DA7 (Bexleyheath / Barnehurst) conservation area usually keeps it. The £274 Lawful Development Certificate is still the document a DA7 owner wants on file.
DA7 (Bexleyheath / Barnehurst) housing stock: 1930s semi-detached dominates; Victorian cottages in Bexley Village and Crayford; post-war estates in Thamesmead and Erith. Outer south-east London suburban; very permissive planning environment; strong PD uptake for extensions and loft conversions. Read that before choosing a house extension route in DA7 (Bexleyheath / Barnehurst) — construction, not postcode, sets what is achievable. Bexley Council charges £548 for a householder application and has 8 weeks to determine it.
Sources for this DA7 house extension 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.
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