FMB Member · NHBC Registered · £5m Insured
Leeds' Trusted Builder — Extensions, Lofts & Renovations
From free planning advice to polished handover, Hartley Build delivers fixed-price projects across West Yorkshire — on time, on budget, every time.
What We Build
From small refurbs to full extensions, our experienced crews handle every stage of your project.
House Extensions
Single and double-storey extensions, orangeries and kitchen extensions — fully project-managed from foundation to finish.
Learn more →Loft Conversions
Velux, dormer and hip-to-gable conversions. Add a bedroom, office or en-suite without the cost of moving.
Learn more →Refurbishments
Full property strip-outs, kitchen and bathroom refurbs, internal reconfigurations and buy-to-let renovation packages.
Learn more →Garage Conversions
Turn your unused garage into valuable living space — home office, gym, extra bedroom or utility room.
Learn more →New Builds
Small-scale new-build projects managed from groundworks through to final finish and snagging sign-off.
Learn more →Structural Repairs
Steel beam installation, wall removals, underpinning and crack repair — structural works handled safely and properly.
Learn more →How We Work
A straightforward process that keeps you informed and in control from first call to final handover.
Free Site Survey
We visit, measure, and listen to your plans at no charge — no obligation attached.
Fixed-Price Quote
Detailed written quote with a full scope of works — no hidden extras, no surprises mid-build.
Build Phase
Our experienced crew on site daily. You receive regular progress updates and have a direct line to your project manager.
Handover
Thorough snagging, sign-off, building regs certificate, and advice on warranties and aftercare.
See the Difference
Drag the slider to compare before and after on a recent rear extension project in Headingley, Leeds.
Victorian terrace rear extension, Headingley — 4m single-storey with glass lantern and bifolds
Recent Projects
Real builds, real results. Explore the full story behind two of our recent projects.
Victorian Terrace Rear Extension, Leeds
The challenge: Open up a narrow kitchen-diner on a 3-bed Victorian terrace in Headingley, tight budget, limited rear depth.
The result: 22m² of gorgeous open-plan space with a glass lantern roof and bifold doors — delivered in 10 weeks, under budget.
Read full case study →Dormer Loft Conversion, Bradford
The challenge: Growing family needed a master bedroom and en-suite but couldn't afford to move to a larger house.
The result: Full-width dormer with double bedroom, walk-in wardrobe and en-suite. Completed in 12 weeks for under £55,000.
Read full case study →What Our Clients Say
Honest reviews from homeowners across Leeds and West Yorkshire.
"Hartley Build transformed our tired terrace into a beautiful open-plan home. The team were professional, tidy and finished on time and on budget. Brilliant."
Sarah M.
Headingley, Leeds
"Absolutely delighted with our loft conversion. The dormer adds so much space and light. The whole process from planning to handover was completely stress-free."
James T.
Roundhay, Leeds
"We had a rear extension and full kitchen refurb done together. Exceptional workmanship — the result is stunning. Would highly recommend to anyone in the area."
Priya D.
Harrogate
Areas We Cover
We cover all of Leeds, Bradford, Wakefield, Harrogate and surrounding West Yorkshire towns. Travel to site for a free survey is always included — no call-out charges.
Common Questions
Quick answers to questions we hear every day.
Do I need planning permission for an extension? +
How long does an extension take to build? +
Are your prices fixed? +
Are you fully insured? +
Will a loft conversion add value to my home? +
Ready to Start Your Project?
Call us or request a free quote online — we reply within one working day and visit within a week.