
Extension & Refurbishment Roofing
Roofing for commercial extensions, refurbishments and change-of-use conversions.
- Pitched and flat roofing for all commercial projects
- Building Regulations compliant
- Fixed pricing with no hidden extras
Commercial Extensions and Conversions Need Expert Roofing
Commercial extensions, refurbishments and change-of-use conversions present roofing challenges that differ from straightforward new builds. Tying new roof sections into existing structures, matching materials on heritage or character buildings, maintaining weathertightness during phased work and meeting updated Building Regulations all require experience and planning.
Radiant Roofing handles roofing for commercial extensions and refurbishment projects across Kent, Sussex and Surrey. We work with architects, contractors and building owners to deliver roofing that meets the specification, integrates with the existing building and complies with current regulations. Whether it is a school extension, office conversion, church repair or retail unit refurbishment, we have the experience to deliver.

How It Works
Project Review
We review architect drawings, inspect the existing building and identify any challenges in tying new roofing to the existing structure.
Detailed Quote
You receive a comprehensive quotation covering all roofing elements, phasing requirements and any material matching — no hidden charges.
Expert Delivery
We deliver the roofing to programme, coordinating with other trades and maintaining weathertightness throughout the build.
Compliance & Guarantee
All work meets Building Regulations. We provide documentation for Building Control and back the installation with our workmanship guarantee.
Project Review
We review architect drawings, inspect the existing building and identify any challenges in tying new roofing to the existing structure.
Detailed Quote
You receive a comprehensive quotation covering all roofing elements, phasing requirements and any material matching — no hidden charges.
Expert Delivery
We deliver the roofing to programme, coordinating with other trades and maintaining weathertightness throughout the build.
Compliance & Guarantee
All work meets Building Regulations. We provide documentation for Building Control and back the installation with our workmanship guarantee.
What Our Extension & Refurbishment Service Includes
We provide roofing for all types of commercial extension and refurbishment, from small office additions to large-scale building conversions.

What Does Extension & Refurbishment Roofing Cost?
Typical price range
£2000 – £30000
VAT may apply depending on the project
Factors that affect the price:
- 1Extension size and roof type
- 2Material specification and matching requirements
- 3Complexity of integration with existing building
- 4Phasing, access and working hour restrictions
Every commercial extension and refurbishment project is different. We provide detailed quotations based on your drawings and a site survey. Contact us to discuss your project requirements.
What Our Customers Say
Verified Google ReviewsJane S.
Kent
They were very friendly, professional and polite and left the site immaculate at the end of the day. I would thoroughly recommend them to others. The work was carried out to a very high standard.
Peter B.
East Sussex
Excellent work, highly recommended! Very knowledgeable, by far the best roofing company we have ever used and super nice guys.
Sarah M.
Surrey
Radiant Roofing completed our roof repair quickly and professionally. Great communication throughout and a fantastic result.
Frequently Asked Questions
Commercial extension roofing varies widely depending on the project scope. Small commercial extensions start from £2,000, while large refurbishment projects can run to £30,000 or more. We provide detailed quotations based on your architect drawings and a site visit.
Yes. We have experience working on listed buildings, churches, schools and character properties where matching existing materials is essential. We source reclaimed tiles and slates, specialist mortar mixes and traditional leadwork to ensure new work blends with the original building.
Yes. We regularly work as a roofing sub-contractor on commercial projects, coordinating with main contractors, structural engineers, scaffolders and other trades. We understand programme management and can adapt our schedule to suit the wider project timeline.
We cover Kent, East Sussex, West Sussex and Surrey. We regularly carry out commercial extension and refurbishment roofing in Tunbridge Wells, Crowborough, Sevenoaks, Tonbridge, Uckfield, Haywards Heath, East Grinstead and surrounding areas.
Yes. All commercial extension and refurbishment roofing is backed by our workmanship guarantee. Materials carry manufacturer warranties. We provide full documentation for Building Control sign-off.
Contact Us!
Get in touch with us!
Looking for a free quote? Just fill in the form below, and we'll take care of the rest!
Contact Information:
Mobile (24/7): 07753 165 005
Landline (Office Hours): 01892 356 967
Email: contact@radiantroofing.co.uk
Head Office:
Address:
Alpha House
Crowborough Hill
Crowborough
TN6 2EG
Opening Hours:
Monday to Friday: 7:30 am – 6:00 pm
Saturday: 7:30 am – 12:00 pm
Sunday: Closed (mobile still available)
Our Mobile and Email is available 24/7