Having the Beams team on hand to manage the project and provide extra reassurance on build decisions was incredibly helpful and made the whole experience stress free.
Kerry
London
They have been extremely efficient and reassuring. It was a complex project but they took it all in their stride. They recommended very good contractors who were all punctual, polite and capable.
Andrew
London
All about trust. I felt comfortable with my money, my project, and my home knowing that the outcome would be to my satisfaction or would be made good.
Chris
London
Loft conversion experts in Lambeth
Lambeth's terraced streets around Clapham, Brixton, Stockwell and Kennington are well suited to loft conversions, and it is one of the most cost-effective ways to add a bedroom or bathroom without extending the footprint of the house. Our vetted specialists know the roof types and planning quirks specific to the borough.
Types of loft conversion
Velux (rooflight) conversion: No structural change to the roofline, usually the simplest option.
Dormer conversion: A boxed extension to the rear roof slope for full head height.
Hip-to-gable conversion: Extends a sloped side roof outwards to square it off.
Mansard conversion: Reshapes the whole rear roof for maximum space, common on flat-roofed terraces.
Is your Lambeth loft suitable?
Most conversions need at least 2.2 to 2.3 metres of head height from floor to ridge, and the roof pitch and existing structure affect which conversion type will work. Victorian and Edwardian terraces common around Brixton and Clapham are generally straightforward, while flats and maisonettes have additional restrictions. A site survey confirms what is possible for your specific loft.
What a loft conversion costs in Lambeth
Cost depends on the conversion type, the roof structure and the finish. Based on Beams estimates for London loft conversion projects, here is a general guide:
Project type | Typical estimate |
|---|---|
Lower end | £35,000 |
Most projects | £55,000 |
Larger or higher spec | £75,000 |
Top 10% of projects | £100,000 |
These are estimate ranges rather than fixed quotes. A Velux conversion sits at the lower end, while a hip-to-gable or mansard conversion with an en-suite pushes it higher. Your builder confirms a fixed price once the design is agreed.
Planning permission for loft conversions in Lambeth
Many loft conversions on houses fall under permitted development if they stay within volume limits and do not extend beyond the existing roof slope facing the road. Flats and maisonettes do not have these rights and generally need full planning permission. Lambeth has more than 60 conservation areas, including Kennington, Albert Square, Clapham Old Town and Vauxhall, where rooflines are more closely controlled, so we check the position for your address before design begins.
How a Beams loft conversion works
1. Get your free estimate: Tell us about your loft, budget and what you need the space for.
2. Meet trusted specialists: Book up to three free visits and compare like-for-like quotes.
3. Convert with confidenceChoose your builder and Beams sets up the contract and milestone payments.
Why a loft conversion beats moving
Moving house comes with stamp duty, agent fees and the disruption of a new area. A loft conversion adds a bedroom, bathroom or office within your existing footprint, usually at a fraction of the cost of moving, and often adds real resale value too.
Converting a loft in Lambeth
Lambeth's Victorian and Edwardian terraces around Clapham, Brixton, Stockwell and Kennington are prime loft conversion territory, typically with pitched roofs suited to dormer or hip-to-gable conversions. Lambeth has more than 60 conservation areas, including Kennington, Albert Square, Clapham Old Town and Vauxhall, so extensions to the roofline on those streets often need full planning permission. Streatham, the borough's southern neighbourhood, is covered by its own dedicated Beams pages.
With the average Lambeth home selling for around £537,000 in the year to July 2026 (ONS/HM Land Registry, provisional), converting the loft is one of the most efficient ways to add space and value. Our specialists also cover the nearby boroughs of Southwark and Wandsworth.
Other services in Lambeth
We also help Lambeth homeowners with:
Bathroom renovation in Lambeth
Basement conversion in Lambeth
Loft conversion in nearby areas:
Ready to convert your Lambeth loft?
Get a free estimate and take the first step. No commitment, no sales pressure.