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Wandsworth · Loft Design & Build

Make room
for more.
Above Wandsworth.

Thoughtful loft conversions across Wandsworth and surrounding South-West London areas — from feasibility and planning regulations to a warm, light-filled room designed for daily life. One dedicated team designs, builds, and finishes every detail.

Free Feasibility On-site survey & structural review
Fixed Quotations Transparent scope, no hidden extras
10-Yr Guarantee Full structural warranty on all builds
Free Consultation & Quote

Request Project Callback

Tell us about your home and ideas. Our technical team will call you to discuss feasibility and arrange a site survey.

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Prefer to talk now? Call 07458 148224

✓ Loft Conversions ✓ House Extensions ✓ Side Returns & Dormers ✓ Warm Roof Insulation ✓ Structural Steels & Joists

What could your roof become?

Choose the structural route that best fits your period home, roof structure, and budget.

01

Dormer Loft Conversions

Add maximum headroom, usable floor space, and natural light with bespoke rear or L-shaped dormers.

02

Mansard & Hip-to-Gable

Reconfigure hipped roofs or period rooflines into expansive, full-height rooms with architectural character.

03

Velux & Rooflight Rooms

Cost-effective, non-intrusive conversions preserving existing exterior rooflines under Permitted Development.

04

Loft Repairs & Structure

Resolve sagging rafters, timber rot, structural joist strengthening, and party wall chimney tie-ins.

05

Insulation & Boarding

Warm-roof PIR thermal insulation, airtight vapour barriers, and heavy-duty structural load-bearing boarding.

06

Roofing & Leadwork

Slates, tiles, high-grade flat roof coverings (EPDM/GRP), gutters, and hand-formed lead flashings built to last.

Extend outwards as well as upwards

From Victorian side-returns to full-width kitchen extensions, our structural team coordinates architectural drawings, steel calculations, and build stages from foundation to finish.

01

Rear House Extensions

Extend into garden space with full-width single-storey extensions, bifold doors, and level patio thresholds.

02

Side Return Extensions

Reclaim unused side alleys on Victorian and Edwardian terraces to create wide, open-plan living and dining areas.

03

Wraparound Extensions

Combine rear and side return extensions for the maximum possible ground-floor footprint expansion.

04

Kitchen & Living Expansions

Design light-filled architectural kitchen hubs with roof lanterns, structural steelwork, and bespoke glazing.

05

Double-Storey Extensions

Add ground-floor living area plus first-floor master suites and family bathrooms for growing households.

06

Structural Knock-Throughs

Remove internal load-bearing walls with precision-engineered steel RSJs for fluid, contemporary open-plan spaces.

Recent projects

Our Work

Meeting your needs is our specialty. Check out our recent projects to see our high-quality execution firsthand.

Floor Transition Installation
Floor Transition Installation
Insulation Installation Service
Insulation Installation Service
Roof Tiling Service
Roof Tiling Service

Local roof knowledge, not a generic quote

01

Local Wandsworth roof expertise

Wandsworth's mix of Victorian terraces, 1930s semis, and period conversions each behave differently under a tape measure. A standard terrace usually suits a rear dormer; a semi with a hipped roof often has room for a hip-to-gable extension. We establish this accurately at survey stage.

02

One dedicated team, start to finish

The person who surveys your loft is directly involved in design, build, and final sign-off. There is no separate sales team promising unrealistic timelines — structure, insulation, stairs, electrics, and finishes are planned cohesively together.

03

Planning & Building Control handled

We handle Permitted Development certificates, conservation area approvals, party wall notices, and Wandsworth Council Building Control inspections from submission through to final completion certification.

04

Fixed written quote & stage payments

Transparent pricing with detailed stage breakdowns before any structural work begins. Milestone payments are strictly linked to verified build progress, ensuring clarity, security, and no surprise add-ons.

05

Minimal disruption, live-in protection

Most homeowners remain comfortably living in their homes during works. We access the roof externally via scaffolding for the heavy structural stages, installing dust seals and protection before opening up stairs.

06

Comprehensive guarantee & £5M insurance

Every completed conversion carries our comprehensive workmanship guarantee and is fully backed by £5,000,000 Public Liability and Professional Indemnity insurance for total long-term assurance.

Need more light, storage, or a new bedroom?

Start with a better roof plan.

Call Desk: 07458 148224
Neighbourhood-Tailored Design

Every property shapes unique possibilities.

Period terraces, hillside homes, and compact urban roofs each require a distinct conversion approach.

Based in Wandsworth or SW London?

Bring us your roof-space idea.

Book a Site Survey

Clear responsibility from start to finish.

A clear sequence from first enquiry to finished room.

1

Explore

Tell us about your property, goals and what you want the loft to become.

2

Measure

We review head height, roof structure, access, planning context and likely options.

3

Plan

You receive a practical scope covering design, approvals, insulation and build stages.

4

Build

Our team coordinates the conversion from opening-up to a clean, finished room.

Reviews from homeowners who have been through it

"They talked us through hip-to-gable versus a straight rear dormer before we signed anything, and were honest that the gable option wasn't worth the extra cost for what we wanted."
— Homeowner, Wandsworth Town
"Managing a period conversion isn't simple, but they knew exactly what the conservation officer would and wouldn't sign off on."
— Landlord, Putney
"One point of contact from the first call to the final coat of paint. No chasing subcontractors, no surprises on the invoice."
— Homeowner, Balham

Common loft conversion questions, answered plainly

How much does a loft conversion cost? ↓

It depends on the type of conversion, roof size, and finish specification. A rooflight-only conversion is the least expensive option; a mansard or L-shaped dormer with ensuite sits at the higher end. You get a written quote after survey, broken down by stage.

Do I need planning permission? ↓

Many loft conversions fall under permitted development rights. That changes if you are in a conservation area, have an Article 4 direction, or exceed permitted development volume limits. We verify this during our initial survey.

How long does a loft conversion take? ↓

A straightforward rear dormer conversion typically takes 6–10 weeks once work begins on site. Larger projects — mansard conversions or ones requiring full planning approval — take longer once planning determination time is factored in.

Will I need to move out during the work? ↓

Most homeowners stay in the property throughout. We seal off the work area and manage access so the rest of the house stays usable, though there will be noise during structural stages.

Get Started Today

Tell us your property. Tell us your idea.

Let's explore the space above your home. Request a call back from our technical team for an initial phone consultation and site survey booking.