Thinking about extending your home in Battersea, London SW11? From the elegant period terraces near Northcote Road and Clapham Junction to the riverside apartments around Battersea Reach and Battersea Power Station, this part of South West London offers some of the most exciting opportunities for high-quality home extensions. Whether you’re adding a contemporary kitchen-diner, a double-storey rear extension, or a side return in a Victorian terrace, extending your Battersea home is one of the most effective ways to increase both space and property value in 2025.
This guide is written specifically for Battersea homeowners — from Queenstown Road and Lavender Hill to Albert Bridge Road — who want transparent pricing, planning advice, and practical insights from Buildaway, a trusted South London construction company known for compliant work, design-led builds, and an 18-month workmanship warranty.
How Much Does a House Extension Cost in Battersea (2025)?
Battersea sits in a premium South West London bracket, reflecting its proximity to the river, strong property demand, and heritage architecture. Below are realistic 2025 price ranges based on Buildaway’s local experience.
Single-Storey Rear Extension
- Build-only: £2,200 – £2,800 per m²
- Fully finished with kitchen: £2,800 – £3,500 per m²
- Example: 25 m² kitchen-diner = £55,000 – £70,000 build-only or £70,000 – £90,000 turnkey.
Double-Storey Rear Extension
- Build-only: £2,000 – £2,600 per m²
- Fully finished: £2,600 – £3,300 per m²
- Example: 40 m² over two floors = £80,000 – £110,000 build-only or £105,000 – £130,000 turnkey.
Side Return & Wrap-Around Extensions
Generally priced in line with single-storey extensions: £2,200 – £2,900 per m², depending on roof type, glazing, and finishes.
These figures represent realistic Battersea and Wandsworth borough rates for compliant, Building Control-approved extensions with premium finishes.
What Drives the Price Up or Down
- Property style – Victorian terraces near Lavender Hill or Clapham Junction often require additional steelwork.
- Location – Conservation areas around Battersea Square and Albert Bridge involve stricter planning rules.
- Glazing & roof design – skylights and flat roofs are economical; bespoke glass panels or bifold doors add £3k–£8k+.
- Kitchen & bathroom quality – kitchens £10k–£25k+, bathrooms £6k–£15k+.
- Groundworks & access – tight rear access or parking restrictions can affect logistics.
- Finishes & joinery – crittall-style glazing, bespoke joinery, and premium surfaces increase cost but enhance long-term value.
Planning Permission & Building Control in Battersea
- Permitted Development (PD): Most single-storey extensions qualify if within height and projection limits.
- Full Planning Permission: Needed for double-storey, wrap-around, or properties in conservation zones.
- Conservation Areas: Some homes near Albert Bridge, Battersea Square, and Clapham Junction fall within Wandsworth Council’s protected zones.
- Building Control: Always required for structure, insulation, plumbing, and electrics.
Buildaway frequently works with Wandsworth Council and private Building Control providers to secure planning and compliance approvals for Battersea homes.
How Long Will It Take?
- Design & planning: 4–12 weeks (longer if full planning is required)
- Technical drawings & approvals: 2–6 weeks
- On-site build:
- Single-storey: 10–14 weeks
- Double-storey: 14–20 weeks
- Add extra time for high-end finishes or bespoke glazing systems.
Typical Full Project Budget Breakdown (30 m² Double-Storey)
| Element | Typical Cost |
|---|---|
| Core structure & shell | £70,000 – £85,000 |
| Windows / doors / glazing | £5,000 – £10,000 |
| Kitchen supply & fit | £12,000 – £25,000 |
| Bathroom fit-out | £6,000 – £12,000 |
| Heating / boiler / Megaflo | £3,000 – £5,000 |
| Flooring & decorating | £5,000 – £15,000 |
| Professional fees & permissions | £3,000 – £8,000 |
| Total realistic range: | £100,000 – £135,000 |
(High-end or heritage-sensitive builds can exceed £150k.)
Why Battersea Clients Choose Buildaway
- Experienced with Victorian and modern homes — extensive experience in Battersea, Wandsworth, and Clapham builds.
- Transparent quoting — itemised costs with no hidden extras.
- 18-month workmanship warranty — providing long-term peace of mind.
- Fully insured & certified — Gas Safe, NICEIC, and full liability insurance.
- Design-to-build expertise — one dedicated team from concept through completion.
Frequently Asked Questions
Do I need planning permission for my Battersea extension?
Often yes — particularly for double-storey or front-facing extensions within conservation zones.
Can I live at home during the build?
Yes, especially for single-storey projects. Buildaway maintains clean, safe, and secure work environments.
Will I need to upgrade my heating or boiler?
If adding large kitchen spaces or additional bathrooms, upgrading to a Megaflo or new boiler is recommended.
What warranty do you provide?
All Buildaway projects include an 18-month workmanship warranty covering structural and finishing work.
Next Steps for Battersea Homeowners
If you’re planning a home extension in Battersea, Clapham Junction, or Nine Elms:
- Book a free consultation to explore your design and budget.
- Buildaway manages design, planning, and full build delivery seamlessly.
- Receive a transparent, itemised quote with clear timelines and milestones.
📞 020 8108 0388 📧 info@buildaway.co.uk
Buildaway — trusted across Battersea for premium, compliant home extensions that blend period character with modern comfort.