Loft conversions remain one of the most popular home renovation projects in London; adding space, increasing property value, and unlocking new living areas without losing garden space. With hundreds of specialists operating throughout the city, choosing a reliable, experienced company is key to a successful loft transformation.
Below are 10 reputable London loft conversion specialists, based on real business listings, independent reviews, and industry presence.
1. i Loft Conversions Ltd
4.9 ⭐Construction company
- 36 Hall Rd, London, E15 2BT
- +44 203 759 5578
- ⭐ 4.9/5 (135+ reviews)
- Services: Velux, dormer, hip-to-gable & bespoke loft builds; full design-and-build service.
- Why choose them: One of the most reviewed loft conversion companies in London with a strong reputation for communication and delivery quality.
Independent customers consistently mention professional teams, attention to detail, and smooth project execution.
2. CS LOFTS
5.0 ⭐ Building firm
- Erindale Court, 15 Copers Cope Rd, Beckenham BR3 1NE
- +44 203 659 8980
- ⭐ 5.0/5 (114+ reviews)
- Services: Loft design and build, dormer, rooflight and mansard conversions.
- Why choose them: Family-run specialist with excellent client feedback and strong focus on customised loft solutions.
3. Trendy Lofts
4.9 ⭐ Custom home builder
- 6 Green Moor Link, Enfield, N21 2ND
- +44 208 351 6536
- ⭐ 4.9/5 (134+ reviews)
- Services: Bespoke loft design & architectural support, planning and construction.
- Why choose them: Highly rated for personalised loft builds and responsive project management.
4. London Lofts
5.0 ⭐ Home builder
- 45 Fitzroy St, London, W1T 6EB
- +44 203 929 2634
- ⭐ 5.0/5 (68+ reviews)
- Services: Complete loft conversion solutions including planning and project management.
- Why choose them: Strong design portfolio with positive customer testimonials and quality finishes.
5. Visionary Lofts London
4.8 ⭐ Home builder
- 83 Tivoli Rd, Norwood, SE27 0EE
- +44 203 442 8505
- ⭐ 4.8/5 (109+ reviews)
- Services: Premium loft conversions with compliance support.
- Why choose them: Well reviewed for client interaction, budget management, and high standards of workmanship.
6. Forest Lofts Ltd
5.0 ⭐ Construction company
- 369 Chingford Rd, London, E17 5AF
- +44 208 711 1483
- ⭐ 5.0/5 (43+ reviews)
- Services: Structural loft builds, dormers, and extensions.
- Why choose them: Consistently positive client feedback and strong project execution record.
7. ABC Loft Conversions Ltd
5.0 ⭐ Construction company
- 50A Thornbury Rd, Isleworth, TW7 4LL
- +44 203 576 9898
- ⭐ 5.0/5 (24+ reviews)
- Services: Bespoke loft builds including dormer and mansard types.
- Why choose them: Highly rated for personalised service and quality craftsmanship.
8. LCL Loft Conversion
5.0 ⭐ Construction company
- 1188 Hertford St, London, W1J 7RT
- +44 7418 355673
- ⭐ 5.0/5 (30+ reviews)
- Services: Dormer, mansard and conversion planning.
- Why choose them: Ideal for homeowners wanting classic conversion styles with experienced guidance.
9. DC Loft Conversions
5.0 ⭐ Home builder
- 316 Flat A, Lewisham High St, SE13 6JZ
- +44 208 089 9602
- ⭐ 5.0/5 (25+ reviews)
- Services: Loft conversions with structural and design inclusion.
- Why choose them: Excellent local reputation across South London and Essex areas.
10. London Loft Family
5.0 ⭐ Custom home builder
- London, ENG
- +44 203 752 8521
- ⭐ 5.0/5 (11+ reviews)
- Services: Home-focused loft conversions with personalised client experience.
- Why choose them: Family-centred service with strong emphasis on communication and delivered value.
London Loft Conversion Companies – Map Overview
Here’s an embeddable map to help users find these specialists visually:
Tips Before You Hire
✔ Always request multiple quotes before starting; costs can vary based on roof type and design complexity.
✔ Check that the company handles planning permission and Building Regulations (required for almost all conversions).
✔ Read verifiable independent reviews over promotional testimonials.
Editorial Disclosure
This list is based on publicly available business information, customer reviews, and online presence at the time of writing. London Renovations is not affiliated with the companies listed below. Business details and reviews may change over time.
Considering a Loft Conversion in London?
If you’d like professional guidance on feasibility, costs, and planning requirements, speak with the team at London Renovations for a no-obligation consultation.
Learn more about our loft conversion services in London and how we manage design, planning, and construction under one roof.
