Our Services
Loft Conversions
About This Service
Loft Conversions You Can Trust
Every loft conversion is backed by a workmanship guarantee, manufacturer warranties on materials, and compliance with building control. With 35 years serving Maidenhead, Windsor, Ascot and surrounding areas, Sub Build Ltd provides in-house design, structural work and finishing under a single point of contact. We give free no-obligation initial indications and issue transparent fixed-price quotations after a full site survey. Our memberships of The Guild of Master Craftsmen, the Association of Master Tradesmen and Local Surveys Direct, alongside our plant hire capability, help reduce delays and keep projects on programme.
Our Process
How It Works
Site survey and design
We carry out a measured survey, agree the intended use and outline options, then produce drawings and structural calculations ready for planning or building control.
Permissions and preparation
We handle planning applications where required, coordinate building control, arrange party wall agreements and prepare the site, including scaffold and plant hire.
Build and finish
Structural alterations, insulation, electrics and joinery are completed by our qualified teams, followed by plastering, decorating and final sign-off with warranties and certificates.
Benefits
Why Choose us for Loft Conversions?
Single point of contact
In-house management from design and planning through to handover removes the need to chase multiple contractors and keeps the project on schedule.
Local, experienced expertise
Thirty-five years of regional experience, plus memberships of The Guild of Master Craftsmen, the Association of Master Tradesmen and Local Surveys Direct, mean work is carried out with a focus on current regulations and best practice.
Reduced delays with plant hire
On-site plant and driver options cut reliance on third parties, speeding up works that require roof lifting, material removal or heavy digging.
What we build
We deliver dormer, hip-to-gable, mansard and rooflight conversions, plus bespoke hybrid solutions for older semis and period houses in Maidenhead, Windsor, Ascot and surrounding areas. Work includes structural steel or timber strengthening, new staircases, insulation to Part L standards, roof coverings, new windows and full internal fit outs.
How we protect your project
Every conversion is completed to building control standards with manufacturer-backed warranties on key products and a workmanship guarantee on our trades. If you already have an architect, we integrate with their drawings. If not, our design team prepares plans and we can submit planning or listed building paperwork. Free initial indications help you gauge feasibility, and we issue a transparent fixed-price quotation after a full site survey.
FAQ
Frequently Asked Questions
Many loft conversions fall under permitted development, but larger dormers or mansards may require planning permission, especially in conservation areas. We assess each property, advise on the likely route and handle submissions if planning is needed.
Related Services
Other Services We Offer
Ready to add a room you will use every day
Book a free initial indication or a full site survey. Call our office on 07834 617 743 or email substructure.b.c@gmail.com to arrange a visit in Maidenhead, Windsor, Ascot and surrounding areas.
Other Services