Loft Conversions
Built Beyond Expectation
JM Loft Conversions specialises in designing and building premium loft conversions. We are a Frome-based loft conversion company covering Trowbridge, Warminster, Bath, and Somerset — adding space, value, and beauty to your home.
⭐⭐⭐⭐⭐ 5-Star Rated · Free Survey · Fixed Price Quotes · 10-Year Guarantee
Our Story
A Local Frome Company. Genuinely.
We've been doing this in the South West for 15 years. We know these streets, these houses, and these planning authorities better than anyone. Over 15 years and more than 200 completed projects later, our commitment hasn't changed.
We're a Frome-based company covering Trowbridge, Warminster, Bath, and Somerset. We live here. We work here. And we take genuine pride in every home we build — because in our communities, reputation is everything.
Quality
Every JM loft conversion is built to the same standard we'd build for our own families.
Transparency
Fixed prices, honest timelines, and clear communication throughout. No surprises.
Local Knowledge
We know South West planning inside out — from Mendip's rural constraints to Bath's heritage rules.
Our Expertise
Loft Conversion Services
JM Loft Conversions builds every type of loft conversion across Somerset and Wiltshire. We help you choose the right solution for your home, budget, and lifestyle.
Dormer Loft Conversions
The most popular conversion in the South West. A dormer extends vertically from your existing roof slope, dramatically increasing headroom and usable floor space.
Velux / Rooflight Conversions
The most cost-effective route. We install high-quality Velux windows into your existing roof pitch — no structural extension required. Ideal for homes with good existing headroom.
Hip-to-Gable Conversions
Perfect for semi-detached and detached homes with hipped roofs. We convert the sloping hip end into a vertical gable wall, often combined with a rear dormer for maximum gain.
Mansard Conversions
The most extensive conversion — we rebuild the rear roof slope at a near-vertical angle, maximising space and ceiling height. Popular in Bath city centre.
Our Showcase
Recent Projects & Case Studies
Explore our portfolio of stunning loft conversions across the South West. From functional dormers to city-centre mansards, every JM project is a masterclass in space and light.
Frome · Dormer Loft
Dormer Loft — Frome
Stunning full-width dormer adding a master suite and en suite to a Victorian semi.
Bath · Hip-to-Gable
Hip-to-Gable — Bath
Heritage-sensitive conversion on a period terrace, maximising loft space in a conservation area.
Trowbridge · Velux Conversion
Velux Conversion — Trowbridge
Cost-effective rooflight conversion creating a bright home office in a 1970s semi.
Frome · Dormer Conversion
Frome Semi-Detached Dormer
Improvement to the floor plan and layout of a Victorian semi in Frome, creating a master suite with en suite bathroom and Juliet balcony. JM worked within permitted development to deliver the project without planning permission, on time and on budget.
Bath · Victorian Terrace
Bath Victorian Terrace Loft
Redefining urban elegance in a period Bath property — bridging heritage sensitivity and modern living in a stunning loft conversion. JM managed the full planning application with Bath & NE Somerset Council, delivering a result the homeowners describe as 'extraordinary'.
Gallery
Our Craftsmanship in Detail
Browse our extensive gallery of completed lofts, showcasing custom joinery, skylight installations, and flawless finishes across the South West.
Where We Work
Areas JM Loft Conversions Cover
JM Loft Conversions is proudly based in Frome and covers Trowbridge, Warminster, Bath, and Somerset. Our local knowledge of planning authorities, property types, and building regulations means your project runs smoothly from day one.
Covering Frome, Trowbridge, Warminster, Bath, and Somerset.
Why We Work
Why Choose JM Loft Conversions
There are many loft conversion companies in the South West. Here's what makes JM different.
What Customers Say
What Our Customers Say
Over 200 South West families have trusted JM with their homes. Here's what some of them say.
“JM transformed our unused loft into a stunning master suite. From first survey to final handover, the whole team was professional, clean, and communicative. Couldn't recommend them more.”
“We had three quotes. JM were not the cheapest but they were the most thorough and the only ones who really understood our old Bath terrace. The result is extraordinary.”
“Fixed price, on time, and the finish is immaculate. JM did a brilliant job on our Trowbridge dormer conversion.”