If you need more living space but don’t want to move, a loft conversion is one of the smartest and most cost-effective ways to extend your home. At STM Builders, we’ve helped homeowners across Birmingham, Solihull, Wolverhampton, Walsall, Dudley, and nearby areas turn unused attic space into stunning new rooms — from bedrooms and offices to en-suites and play areas.
Loft conversions are ideal for UK homes, especially traditional semis, terraces, and bungalows. Most can be completed under permitted development, meaning you won’t always need planning permission. We take care of the full process — from design and structural work to electrics, plumbing, stairs, and finishing touches.
Our team works cleanly, safely, and in line with UK building regulations to give you extra space without losing your garden. With over 20 years of experience, we know how to get the best out of your loft — while keeping disruption to a minimum.
Whether you’re planning a dormer loft, hip-to-gable conversion, or a full mansard, we’ll help make the most of the space above your ceiling.
Loft Conversion Types We Offer
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Dormer Conversions
Adds a box-like structure to the roof — great for extra headroom, natural light, and floor space.
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Velux (Rooflight) Conversions
Keeps your existing roof shape — simple and cost-effective with roof windows for light.
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Hip-to-Gable Conversions
Ideal for hipped roof homes — extends the side roof to create a vertical wall and more room.
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Mansard Conversions
Maximise space with a rear-sloping extension — great for larger homes or townhouses.
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L-Shaped Dormers
Combines rear and side dormers — popular for Victorian and Edwardian properties in the UK.
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Loft En-Suites & Storage Solutions
Add extra convenience with fitted bathrooms and built-in wardrobes or eaves storage.
Our Loft Conversion Process
1 Loft Survey & Feasibility Check
We inspect your loft, check ceiling height and structure, and advise what’s possible. 
2 Planning & Design Support
We help with architectural drawings and guide you through permitted development or planning permission. 
3 Fixed Quote & Timeline
Receive a detailed quotation including structural work, insulation, stairs, and finishes. 
4 Construction & Fit-Out
We build your conversion step by step — roof, flooring, windows, stairs, electrics, plumbing, and more. 
5 Completion & Certification
Your loft is finished, cleaned, and signed off with building control compliance.