London & Essex Loft Conversion Specialists
Loft Conversions in London & Essex
From £18,000
Add a bedroom, home office or bathroom without moving house. We design, plan and build dormer, hip-to-gable, mansard and Velux loft conversions across London and Essex — one company from first survey to Building Control sign-off.
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Types of Loft Conversion
Dormer Loft Conversion
Most PopularA box-shaped extension built out from the roof slope giving full head height, vertical walls and large windows. Suits most terraced and semi-detached London and Essex homes.
From £35,000
Hip-to-Gable Conversion
Extra SpaceExtends the sloped hip end of the roof outward to create a vertical gable wall and much more usable floor area. Ideal for detached and semi-detached properties.
From £42,000
Mansard Conversion
Maximum RoomA full rear roof alteration creating a near-vertical rear wall and flat roof. Maximises floor area and head height — common on Victorian and Edwardian terraces.
From £50,000
Velux / Rooflight
Best ValueThe most cost-effective route with no change to the roofline. High-spec roof windows bring in light and ventilation where existing head height allows.
From £18,000
All prices are guide figures. A fixed quote is provided after a site survey.
Design → Build → Handover Timeline
Free Design Consultation
We visit, measure the loft, assess head height, roof structure and Party Wall obligations, and give you a written feasibility report.
Design & Planning Handled For You
In-house drawings, then we advise on Permitted Development vs planning permission and manage the full submission so you never chase the council.
Structural & Building Regs
Structural engineer calculations and Building Regulations approval handled in-house — no third parties to coordinate.
Build (8–14 weeks)
One directly employed team: carpentry, steelwork, insulation, first-fix electrics and plumbing, plastering and decoration.
Sign-Off & 10-Year Guarantee
Building Control completion certificate issued and full warranty documentation handed over with your finished room.
Finance Options Available
Spread the cost of your project with flexible finance. We work with regulated home-improvement finance partners offering buy-now-pay-later, interest-bearing and interest-free options on approved applications, subject to status and affordability checks.
Tell us your budget at the free consultation and we will show you indicative monthly figures alongside the fixed quote, so you can plan with confidence before committing.
Recent Projects
A selection of completed loft conversions across London and Essex. Full project galleries and references are shared at your consultation.
Frequently Asked Questions
Do I need planning permission for a loft conversion?
Most loft conversions in London and Essex fall under Permitted Development and do not need planning permission, provided they meet volume limits (40m³ for terraces, 50m³ for detached and semi-detached) and do not extend above the existing ridge. We confirm eligibility at the survey and handle any planning application for you where one is needed.
What is the Party Wall Act and do I need it?
If the conversion involves work on or near a wall shared with a neighbour, the Party Wall Act 1996 applies. We identify this at survey and guide you through serving notice. Party wall surveyor costs are typically £800 to £1,500 per neighbour, and we manage the process end to end.
How long does a loft conversion take?
A Velux conversion takes around 4 to 6 weeks, a dormer typically 8 to 10 weeks, and a full mansard 12 to 14 weeks on site. Design, planning and Building Regs approval add roughly 8 to 14 weeks beforehand. You get a fixed programme before we start.
How much does a loft conversion cost?
Velux conversions start from around £18,000, dormers from £35,000, hip-to-gable from £42,000 and mansards from £50,000 for a standard London or Essex property. The final figure depends on size, specification and structural complexity, and is fixed before work begins.
Do I have to move out during the works?
No. Early-stage work is carried out from external scaffolding and internal works are sequenced to keep disruption to a minimum. Most clients remain living in the property throughout the build.
Ready to start your loft conversion?
Book a design consultation across London and Essex. We confirm feasibility, type, timescale, finance options and a fixed price.
Call 07784 043887