Thinking about extending your home in Peckham, London SE15? With its mix of period terraces, creative architecture, and thriving cultural scene, Peckham is one of South East London’s most desirable spots for ambitious home improvement. From the Victorian houses near Bellenden Road and Peckham Rye Park to the modern apartments around Queens Road and Copeland Park, a well-designed home extension can transform space, increase comfort, and add major value — without leaving this vibrant community.
This guide is written specifically for Peckham homeowners — whether you’re based near Nunhead, Rye Lane, or The Aylesham Centre — who want transparent pricing, realistic 2025 cost breakdowns, and trustworthy advice from Buildaway, a leading South East London construction company known for compliant builds, honest communication, and an 18-month labour warranty.
How Much Does a House Extension Cost in Peckham (2025)?
Peckham’s housing stock is diverse — from classic Victorian terraces to modern flats — which means extension costs vary depending on size, design, and finish. Below are the average 2025 ranges based on current market conditions across SE15.
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
Typically priced in line with single-storey extensions — £2,200 – £2,900 per m², depending on glazing, roof type, and internal fit-out.
These rates reflect Peckham’s mid-London construction market, balancing modern design expectations with quality, regulation-compliant building work.
What Drives the Price Up or Down
- Property type – Victorian terraces off Choumert Road or Bellenden Road often need steelwork for open-plan layouts.
- Roof style & glazing – skylights and flat roofs are more affordable; large glass panels or bifold doors add £3k–£8k+.
- Kitchens & bathrooms – kitchens £10k–£25k+, bathrooms £6k–£15k+.
- Groundworks & drainage – older drains or clay-heavy soil can require adjustments.
- Access & logistics – narrow streets and controlled parking zones can add minor delivery costs.
- Finishes & design – bespoke carpentry, polished concrete floors, or architectural glazing raise budgets but elevate the result.
Planning Permission & Building Control in Peckham
- Permitted Development (PD): Many rear extensions qualify if within height and size limits.
- Full Planning Permission: Required for double-storey, wrap-around, or conservation area homes.
- Conservation Areas: Some streets near Peckham Rye and Nunhead fall within conservation zones.
- Building Control: Always required for structure, insulation, drainage, and electrical compliance.
Buildaway regularly works with Southwark Council and private Building Control inspectors to ensure seamless compliance, efficient approvals, and stress-free handovers.
How Long Will It Take?
- Design & planning: 4–12 weeks
- Technical drawings & approvals: 2–6 weeks
- On-site build:
- Single-storey: 10–14 weeks
- Double-storey: 14–20 weeks
- Allow additional time for bespoke glazing, kitchens, or detailed joinery.
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 architect-led projects may exceed £150k.)
Why Peckham Clients Choose Buildaway
- Proven local expertise — experienced with Victorian conversions and contemporary infills across SE15.
- Transparent pricing — detailed quotes, no hidden extras.
- 18-month labour warranty — extended protection for all works.
- Fully insured & certified — Gas Safe, NICEIC, and public liability cover.
- End-to-end delivery — from planning through to completion and sign-off.
Frequently Asked Questions
Do I need planning permission for my Peckham extension?
Not always — smaller rear extensions often qualify under PD, but conservation areas or double-storey builds will need permission.
Can I live at home while the work is done?
Yes, especially for single-storey builds. We maintain safe zones and minimise disruption.
Will I need to upgrade my heating system?
If you’re adding bathrooms or large open spaces, a new boiler or unvented cylinder (Megaflo) is often worthwhile.
What warranty do you provide?
Buildaway offers an 18-month workmanship warranty on all structural and finishing work.
Next Steps for Peckham Homeowners
If you’re planning a home extension in Peckham, Nunhead, or Bellenden Village:
- Book a free home visit with Buildaway to explore your design ideas.
- We handle planning, design, and construction from start to finish.
- Receive a transparent, itemised quote and realistic project schedule.
📞 020 8108 0388 📧 info@buildaway.co.uk
Buildaway — trusted across Peckham for high-quality home extensions that combine craftsmanship, compliance, and creativity.