Loft Conversions
An extra bedroom, office, or bathroom hidden in the roof you already own.
What we do
A loft conversion is one of the most cost-effective ways to add a bedroom, bathroom, or home office without eating into your garden or extending your footprint. In Croydon, where a lot of the housing stock is 1930s semis and Victorian terraces with decent roof space, a loft conversion is often the obvious move — and most can be done under Permitted Development without a planning application.
We carry out dormer loft conversions, hip-to-gable conversions, and L-shaped dormers across Croydon and surrounding areas. Dormers are the most common: a flat-roofed or pitched-roof box built out from the rear slope to create usable headroom across the full width of the room. Hip-to-gable conversions are particularly popular on 1930s semis in areas like Shirley and Sanderstead, where the hipped roof wastes a lot of potential space. L-shaped dormers combine a rear dormer with a side dormer for maximum floor area — ideal if you want a bedroom with en-suite and still have room left over.
We handle everything from initial survey and structural design through to Building Regulations sign-off. That includes the steelwork, staircase, fire safety measures (fire doors, smoke detection, escape windows), insulation, electrics, plumbing for any en-suite or bathroom, plastering, and full decoration. We’ll also sort the scaffolding and any temporary weather protection needed while the roof is open.
What's included
What to expect
A clear, predictable process from first conversation to final sign-off.
Loft survey
We inspect your loft space, measure ridge height and rafter pitch, check the existing roof structure, and confirm whether a conversion is feasible. Not every loft works — we’ll tell you straight if yours doesn’t.
Design and structural engineering
Our designer produces floor plans and elevations. A structural engineer specifies the steel beams, new floor joists, and any modifications to the existing roof structure. We submit everything to Building Control.
Scaffolding and roof works
Scaffolding goes up and we open the rear roof slope to build the dormer frame. The structure is weathered in as quickly as possible — typically within the first week — so rain isn’t a concern.
Structural and first fix
Steel beams are installed, the new floor is laid, and the staircase is built. First fix electrics, plumbing (for any bathroom), and insulation go in. Fire doors are fitted to bedrooms and the staircase.
Second fix and finishing
Plastering, bathroom tiling and fitting, second fix electrics (sockets, switches, lighting), skirting, architraves, and full decoration. The staircase is finished with balustrade and handrail.
Sign-off
Building Control inspect and issue a Completion Certificate. We carry out a final snagging walk-through with you and hand over all documentation.
Loft survey
We inspect your loft space, measure ridge height and rafter pitch, check the existing roof structure, and confirm whether a conversion is feasible. Not every loft works — we’ll tell you straight if yours doesn’t.
Design and structural engineering
Our designer produces floor plans and elevations. A structural engineer specifies the steel beams, new floor joists, and any modifications to the existing roof structure. We submit everything to Building Control.
Scaffolding and roof works
Scaffolding goes up and we open the rear roof slope to build the dormer frame. The structure is weathered in as quickly as possible — typically within the first week — so rain isn’t a concern.
Structural and first fix
Steel beams are installed, the new floor is laid, and the staircase is built. First fix electrics, plumbing (for any bathroom), and insulation go in. Fire doors are fitted to bedrooms and the staircase.
Second fix and finishing
Plastering, bathroom tiling and fitting, second fix electrics (sockets, switches, lighting), skirting, architraves, and full decoration. The staircase is finished with balustrade and handrail.
Sign-off
Building Control inspect and issue a Completion Certificate. We carry out a final snagging walk-through with you and hand over all documentation.
Typical costs
£45,000 – £85,000+
A rear dormer loft conversion in Croydon typically costs £45,000–£60,000 including a bedroom, en-suite shower room, staircase, and full decoration. Hip-to-gable conversions on 1930s semis are usually £55,000–£70,000 because of the additional structural work involved. L-shaped dormers, which give the most space, range from £65,000 to £85,000+. Costs include all structural work, insulation, electrics, plumbing, plastering, and decoration.
Typical timeline: 8–12 weeks on site for most loft conversions. Dormer conversions are typically quicker (8–10 weeks) while hip-to-gable and L-shaped dormers take 10–12 weeks. Allow 4–8 weeks before that for design, structural calculations, and Building Control submission.
Recent projects
Get a quote for your loft conversions
Tell us about your project and we'll arrange a free site visit. No obligation, no hard sell — just honest advice and a clear price.
Other services
Many of our projects combine more than one service — doing everything together is usually cheaper and less disruptive.
House Extensions
More space without moving. Rear, side-return, and wrap-around extensions built to last.
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Kitchen Refurbishment
Complete kitchen design and installation, from layout changes to full structural alterations.
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Full House Renovations
Whole-house renovations and period property restoration, from stripped shell to finished home.
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