If you’re after a builder in St Helens who turns up when he says he will and does the job properly, to a price we have agreed, that’s us. We’re Rainford Buildings and we’re based at Moss Park Estates in Rainford.
We’re known for garage conversions and garden rooms, but we’re a general builder, experienced in everything from extensions and knock-throughs to full renovations and barn conversions.
What we build
- Extensions. Single-storey extensions, from planning to the finished room. Our Crank Hill job was a single-storey extension with a full refurbishment of the house.
- Garage conversions. We turn the garage into a proper room that’s insulated, wired and ready to use.
- Knock-throughs. We open up walls to create bigger, brighter living spaces, with the right structural support.
- Garden rooms. Bespoke timber-framed garden rooms for offices, gyms or just extra space.
- Home renovations. Full and partial refurbishments.
- Roofing and cladding. Most types of roofing and cladding work.
Recent work in St Helens
We’ve just converted a garage in Laffak, with a knock-through into the main house and a handy downstairs WC with en-suite. The whole job took three weeks, from start to finish. You can see more of our work on our projects page.

Why people pick us
- We’re local, so we’re never far from the job.
- You deal with Mark directly from quote to handover, so you’ve got one point of contact, whoever’s on site.
- We keep your home tidy and keep you updated, so you can follow the job against the scope of works we gave you.
- We’ll tell you straight from the off whether you need planning permission or whether it falls under permitted development, and deal with the council and building control for you. Our free St Helens planning guide explains the rules.
What our customers say
Rainford Buildings did a great job in breaking through a door opening from our integral garage to the hall. This was a dusty job but the team ensured carpet protection was in place and each day they tidied up. The team always arrived on time and kept us uptodate on progress. The quality of the workmanship was top notch and I would highly recommend Rainford Buildings.
Iain, Google review
Rainford Buildings did a part garage conversion for us. After messaging, everything was arranged within 2 weeks and the work was completed quicker than we thought. Took the stress of talking to the council about building regs away aswell. Really good experience and we are made up with how it looks. Would definitely recommend
Joseph, Google review
Daughters hangout in the garden was an aging caravan. We met Mark at Rainford Buildings with a vision of what we would like. So grateful to have contacted him as he made our vision a reality. Professional service throughout. I do believe that he genuinely cares of each building work he undertakes. He was there for reassurance throughout the project, whatever time I was panicking over something or other! . The team on site were polite and hardworking.
We are so happy with the finished garden room. I would absolutely recommend if you are thinking of any building work.
Kathryn, Google review
Read more of our Google reviews
Areas we cover
St Helens, Rainford, Windle, Eccleston, Rainhill, Haydock, Billinge, Sutton, Thatto Heath, Ormskirk, Skelmersdale and nearby areas.
Get a quote
Tell us what you’re thinking of doing and we’ll come and have a look. Call 07816 605168 or use the contact form.