Welcome to Ventus Design & Build!

Enhance Your Living Space with a Loft Conversion

Bespoke Design & Planning

Over 16 Years of Experience

Free Consultation & Itemised Quotes

Full Cost Transparency & Project Management

Insurance Backed Warranty

As a top design and construction company in London, Good Design Build is well-known for its expertise in loft conversions.
We take the time to understand each client’s specific requirements and preferences. From there, we develop a custom quotation and detailed project plan tailored to their needs.

Don't move. Extend in style

We can save you the hassle that comes with moving not to mention the heavy stamp duty! Adding an extra loft bedroom or enlarging the living kitchen dining space on ground floor is an economical way of transforming your home to suit growing needs. The projects can range from £40-100K depending on your requirements and can be completed within 8-16 weeks.

Testimonials

Testimonials from Our Trusted Clients

“Thank you to Amol and his entire team for delivering us a fantastic extension to our newly purchased home. The guys were friendly and very professional during all stages”

Sarah M.
Sarah M.

Homeowner

“Originally, we’d planned on this being a property to rent out to others. Since the loft conversion, we’ve fallen back in love with the place – and have now decided to move back here.”

James K
James K

Business Owner

“I would like to thank GDB for all of their hard work, ideas and inspiration and for being so approachable and easy to deal with during the our rear extension. I would happily recommend them to anyone thinking of starting a building project”

Linda T
Linda T

Property Developer

“Good Design provided the architectural services as well as building work. It was great to have both bundled into one. They were very flexible and great to work with - nothing was too much trouble. I would highly recommend them.”

David L
David L

Green Building Advocate

Planning Permission & Permitted Development

The Good Design and Build Company oversees the entire design and construction process, including securing planning permissions for wraparound extensions. We engage with local planning authorities to guarantee that your project adheres to all necessary building regulations, such as party wall agreements and prior approvals. To learn more, please visit our planning services page or consult our detailed guide.

Frequently Asked Questions

Loft conversion costs in London are £40,000 to £70,000 on average excluding VAT and fees. The costs will vary depending on the size and complexities of the conversion. Good Design & Build loft conversion costs are as follows:

  • Room in the roof conversion (basic) – £1,150 – £1,350 per square metre
  • Dormer loft extension – £1,250 – £1,450 per square metre
  • Mansard extension – £1,500 – £2,500 per square metre
  • Hip-to-gable extension – £1,500 – £2,500 per square metre
  • Change of roof structure – £1,350 – £1,550 per square metre

Areas we cover

GET YOUR FREE EXTENSION QUOTE