Battersea (SW11) is one of South West London’s most vibrant and sought-after neighbourhoods, known for its mix of riverside living, Victorian terraces, and modern developments. Famous for Battersea Park, the redeveloped Battersea Power Station, and its proximity to the Thames, the area has seen significant regeneration in recent years. With quick transport links from Clapham Junction, Battersea Park, and the Northern Line extension at Battersea Power Station, it’s a prime location for families and professionals. Homes here range from period terraces near Battersea Square to luxury riverside apartments — with many properties well-suited to loft conversions to unlock extra bedrooms, offices, or en-suites.
If you’re running out of space in Battersea, a loft conversion can help you stay in the area you love while creating valuable new living space. This Battersea-specific guide covers 2025 price ranges, inclusions, planning and building regulations, timelines, ROI, and expert advice on choosing the right builder.
How much does a loft conversion cost in Battersea?
Pricing below reflects South West London / Battersea market rates for 2025 (labour + materials), with compliant insulation, structural works, and quality finishes.
| Conversion Type | Typical Total Range (2025) | Best For | What You Typically Get |
|---|---|---|---|
| Velux / Rooflight | £25,000 – £35,000+ | Economical extra room | Steels, joists, insulation, 1–2 rooflights, plaster/paint, electrics, heating tie-in |
| Rear Dormer (most popular) | £35,000 – £55,000+ | Full-height bedroom + en-suite potential | Everything in Velux plus dormer structure, cladding, staircase, more daylight/floor area |
| Hip-to-Gable (with or without dormer) | £50,000 – £65,000+ | 1930s semis & end-terraces in Battersea | Extend hip to gable, larger usable space, extra steels, often combined with rear dormer |
| Mansard | £60,000 – £80,000+ | Victorian terraces / conservation areas | Roof rebuild, mansard walls/windows, bespoke staircase, high insulation, maximum headroom |
Add-ons to budget for:
- En-suite fit-out: £4,000 – £8,000+
- Juliet balcony / large glazing: £2,000 – £6,000+
- Bespoke staircase/joinery: £1,500 – £4,000+
What’s included in those prices (and what isn’t)
Included:
- Survey, structural calcs, Building Control liaison
- New steels, joists, floor deck
- Roof alterations (Velux, dormer, hip-to-gable, mansard)
- Insulation to Part L regs
- Fire safety (alarms, FD30 doors, escape windows)
- Electrics & heating integration
- Plaster finish and basic joinery
- Standard staircase to Part K compliance
- Building Control inspections & certificate
Exclusions:
- Bathroom sanitaryware & tiling
- High-spec finishes (stone, crittall, bespoke wardrobes)
- Planning application & Party Wall surveyor fees
- Full re-roofing outside loft scope
- Decorating beyond mist coat/basic paint
What drives loft conversion cost up — or down
Cost drivers (increase costs):
- Mansards in conservation areas like Battersea Square
- Bespoke staircases in narrow Victorian properties
- Adding bathrooms/en-suites with tiling and waterproofing
- Juliet balconies or large feature glazing with Thames views
- Difficult access/parking near Battersea Park or riverside apartments
Ways to control costs:
- Stick within Permitted Development limits
- Stack bathrooms over existing plumbing
- Use standard staircase geometry
- Prioritise insulation/airtightness and upgrade visible finishes
Planning permission & building regulations in Battersea
- Permitted Development (PD): Most Velux and rear dormers qualify.
- Planning permission: Required for mansards, front dormers, or homes in Battersea conservation areas.
- Party Wall Act 1996: Applies to most terraces/semis; budget £1,000–£2,000+ per neighbour.
Building Regulations:
- Part A – structure
- Part B – fire safety
- Part K – staircases
- Part L – insulation
- Part P – electrics
- Ventilation – extractors in wet rooms
Timeline: how long does a loft conversion take?
- Pre-construction approvals: 3–8 weeks
- Velux build: 4–6 weeks
- Rear Dormer: 6–8 weeks
- Hip-to-Gable/Mansard: 8–12+ weeks
- Snagging & completion: 1–2 weeks
ROI: how much value can a loft conversion add in Battersea?
A loft conversion in Battersea typically adds 10–20% to property value. With high buyer demand for family homes near Battersea Park, Clapham Junction, and the redeveloped Battersea Power Station, an extra bedroom and en-suite is often a decisive selling point.
How to choose the right loft conversion company in Battersea
- End-to-end design & build expertise
- Transparent, itemised pricing
- Compliance-first approach (Building Control + fire regs)
- Buildaway’s 18-month workmanship warranty
- Proven portfolio of SW11 projects
Budget-smart tips (without cutting corners)
- Plan headroom early in Victorian terraces
- Design staircase at the outset for better layouts
- Keep new plumbing aligned with existing stacks
- Invest in insulation & airtightness for comfort and energy savings
- Spend on visible features like glazing, lighting, and brassware
Example Buildaway packages (guide pricing)
- Velux Room-in-Roof — £27,500–£34,500
Steels, rooflights, insulation, staircase, electrics, plaster finish. - Rear Dormer + En-suite Ready — £42,000–£56,000
Dormer, staircase, insulation upgrades, electrics/heating, plaster finish. En-suite fit-out +£4,000–£8,000. - Hip-to-Gable with Rear Dormer — £54,000–£68,000
Hip-to-gable extension, steels, dormer, staircase, compliance, plaster finish.
(All guide prices include labour, materials, waste removal, and Building Control. Final quotes vary by survey, access, and specification.)
FAQs (Battersea)
Do I need planning permission?
Not usually for Velux/rear dormers under PD; yes for mansards, front dormers, or homes in conservation areas.
Can I add an en-suite?
Yes — typically £4,000–£8,000+.
Will my roof need strengthening?
Yes, most Battersea homes require new steels/joists.
Can we live at home during the build?
Yes, though expect noise/dust. Properties remain secure and weatherproof.
How do you handle fire safety?
Alarms, FD30 doors, escape windows, and protected staircases.
What warranty do you provide?
18-month workmanship warranty.
Why Battersea homeowners choose Buildaway
Local expertise across Battersea Park, Clapham Junction, and Nine Elms.
Full compliance with Building Control, Party Wall, and fire regs.
Transparent, no-surprise pricing.
Skilled, accountable in-house trades.
18-month workmanship warranty and reliable aftercare.
High-quality materials and finishes for a premium result.