Loft conversions · Extensions · Huddersfield
More space,withoutmoving house.
Loft conversions and extensions across Huddersfield and Kirklees, managed by one team from the first drawing to the final building control sign-off.
- Fully insured
- Plans & building regs handled
- Huddersfield & Kirklees

- Dormer lofts
- Hip-to-gable
- Rooflight lofts
- Rear extensions
- Two-storey extensions
- Knock-throughs
- Plans & building regs
- Fully insured
What we do
Lofts and extensions, start to finish.
Most of our work is lofts and extensions for growing families. We look after the drawings, approvals and the build, so you only deal with one team.
Talk through your project- 01Lofts
Dormer loft conversions
A full-width dormer adds a proper room with standing height, often with space for an en-suite.
- 02Lofts
Rooflight conversions
Where there’s enough head height, a simpler conversion that keeps your roofline as it is.
- 03Lofts
Hip-to-gable & mansard
Re-shaping the roof to get the most usable floor space out of a semi or end-terrace.
- 04Extend
Single-storey extensions
Kitchen-diners and garden rooms that open up the back of the house to the light.
- 05Extend
Two-storey & side extensions
Extra bedrooms upstairs and more living space below, delivered as one build.
- 06Open up
Knock-throughs & steelwork
Taking out walls and fitting steels for open-plan living, with structural calculations arranged.
Finished projects
Space you’ll actually use.
Loft bedrooms, kitchen extensions and open-plan living from homes around Huddersfield and the Holme Valley.
Every house is different. Book a free survey and we’ll tell you what your loft or garden can realistically give you.

Why Crestwood
One team for the drawings, approvals and build.
A loft or extension is one of the biggest things you’ll do to your home. The worry is usually juggling architects, engineers, building control and trades who don’t talk to each other.
Crestwood takes all of that on. Founded by Rob Haigh in 2011, we’ve converted lofts and built extensions across Huddersfield, the Holme Valley and the Colne Valley ever since, with one project manager running each job from survey to sign-off. Every loft and extension comes with a 10-year insurance-backed guarantee.
- Fixed, itemised quotes
- Plans & approvals handled
- One point of contact
- Building control sign-off
How it works
From first visit to the keys back.
A clear process, so you always know what happens next and who’s doing it.
Free home survey
We look at your loft or garden, check head height and access, and talk through what’s possible and roughly what it costs.
Drawings & approvals
We arrange the plans, structural calculations, planning or permitted development and building regulations.
Build & handover
Your project manager runs the build day to day, and you get a building control completion certificate at the end.
Reviews
Families who found the space.
What people said once the scaffolding came down.
“We were going to move house for a third bedroom. Twelve weeks later we had a dormer with an en-suite and we didn’t have to leave.”
“They dealt with the drawings, building control and our neighbour’s party wall. All we had to do was choose the tiles.”
“Same project manager from the survey to the final sign-off. The kitchen extension was finished the week they said it would be.”
Example reviews for this demo. A live site would show the firm’s real Google reviews.
Where we work
Huddersfield & Kirklees.
Based in Huddersfield, Crestwood works across Kirklees, including the Holme Valley and Colne Valley. Not sure if we cover your street? Just ask.
- Huddersfield
- Holme Valley
- Colne Valley
Ready when you are
Outgrowing your home? Let’s look at the options.
Get in touch
Start with a free survey.
Tell us a little about your house and what you’re hoping for. We’ll arrange a time to visit, measure up and talk through the options, with no obligation.