Bespoke Loft Conversions in London.
Unlock the hidden potential in your home with a professionally designed and built loft conversion by Puzzle Constructions Group.
Transform Your Loft into a Beautiful Living Space.
Our expert London team specializes in designing and constructing high-quality loft conversions tailored to your home's structure and your lifestyle. Whether you're adding an extra bedroom, home office, or creative studio, Puzzle Constructions Group handles every stage — from planning and structural design to electrical, plumbing, and finishing.
We ensure full compliance with UK Building Regulations and local planning authorities, guaranteeing a safe, stunning, and long-lasting space. Our in-house team of architects, builders, and tradespeople work together seamlessly to deliver exceptional results on time and on budget.
Types of Loft Conversions We Offer
Dormer Loft Conversions
Add substantial headroom and floor space with our most popular option for London homes. Creates vertical walls and additional living area.
Velux (Rooflight) Conversions
Ideal for quick transformations without major structural work — bright, cost-effective, and efficient. Perfect for properties with good existing headroom.
Hip-to-Gable Conversions
Perfect for semi-detached and end-of-terrace properties, extending your roofline for a larger, usable area. Often combined with a rear dormer.
Mansard Conversions
Premium design for maximum space — commonly seen in London's period properties. Features a flat roof and steeply sloped walls for optimal floor area.
Why Choose Puzzle for Your Loft Conversion
All Trades In-House
Structural, electrical, plumbing, and finishing — all managed under one roof for seamless delivery.
Fully Certified
FMB, NICEIC, and Gas Safe accredited for complete peace of mind.
Transparent Costs
Detailed quotes with no hidden extras — you know exactly what you're paying for.
London Experts
Deep experience with local building codes, planning requirements, and architectural styles.
Our Step-by-Step Process
Consultation & Survey
Site visit, feasibility check, and detailed quote tailored to your requirements.
Design & Planning
Architectural drawings and council submissions if required.
Structural Build
Framework, insulation, stairs, and main construction work.
Finishing Touches
Electrical, plumbing, flooring, and painting to complete the space.
Final Handover
Quality inspection and completion certificate for your records.
Recent Loft Conversion Projects in London
 Conversions.png)
Loft Conversion FAQs
Most loft conversions fall under permitted development rights and don't require planning permission. However, if your property is in a conservation area or the conversion exceeds certain size limits, planning permission may be required. We handle all planning submissions if required.
A typical loft conversion takes 6–10 weeks from start to completion, depending on the type of conversion and scope of work. More complex projects like mansard conversions may take longer. We provide a detailed timeline during consultation.
Most homes with sufficient head height (typically 2.2m from floor joist to ridge) are suitable for a loft conversion. We perform a free structural survey to confirm feasibility before any work begins, giving you complete clarity on what's possible.
Yes — we carefully plan builds to minimize disruption to your daily life. Most of the work takes place in the loft area, and we maintain clean, safe access throughout your home. We'll always communicate the schedule clearly so you know what to expect.
Costs vary depending on the type of conversion, size, and specifications. A basic Velux conversion typically starts from £35,000, while larger dormer or mansard conversions can range from £50,000 to £100,000+. We provide detailed, transparent quotes after our initial survey.
Ready to Transform Your Loft?
Speak to our London-based construction experts today for a free consultation.