Loft Conversion Specialists in London
Transform your unused loft into a beautiful living space. RIBA chartered architects, planning expertise, fixed-price quotations.
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Loft Conversion Specialists in London
Crown Architecture & Structural Engineering Ltd are London’s leading loft conversion specialists. We design and manage dormer, mansard, hip-to-gable and Velux loft conversions across all London boroughs.
Our RIBA chartered architects handle everything — architectural drawings, structural calculations, planning applications, and building regulations approval — so you have a single point of contact from first consultation to completion.
Types of Loft Conversion We Design
- Dormer Loft Conversion — the most popular choice, adds a box-shaped extension to the roof slope
- Mansard Loft Conversion — maximises usable space with near-vertical rear wall and flat roof
- Hip-to-Gable Loft Conversion — ideal for semi-detached and end-of-terrace homes
- Velux / Roof Light — most affordable option, preserves the existing roofline
Why Choose Crown Architecture?
- RIBA Chartered Practice — full professional indemnity insurance
- 500+ successful projects across London
- Fixed-price quotations — no hidden costs
- Planning approval success rate: 98%
- Average loft conversion cost guide: £35,000–£65,000
What Our Clients Say
“Crown Architecture made the entire process stress-free. From first consultation to planning approval took just 9 weeks. Exceptional service.”
“Professional, responsive, and incredibly knowledgeable. Our project came in on budget and the design exceeded our expectations.”
“Got planning permission in 8 weeks — we’d been refused before with a different architect. Crown Architecture understood exactly what the council wanted.”