Trusted Manchester Builders for Extensions, Renovations & Conversions
Welcome to KWS Builders, your local building experts in Manchester, Greater Manchester, and surrounding areas. We specialise in high-quality house extensions, new builds, full home renovations, landscaping, garage & cellar conversions, garden rooms, loft conversions, and dormer extensions — delivered with professionalism, clear communication, and attention to detail.
Building Your Dreams
30 Years Of Undefeated Success
We proudly serve Manchester, Ardwick, Salford, Stockport, Oldham, Levenshulme, Cheetham Hill & Greater Manchester
100+
Successfully Project Finished.
30+
Years of experience with 4.9 ⭐⭐⭐⭐ rating.
100+
Successful Projects Finished.
Our core services
Create more space and enhance your lifestyle.
Our house extension services include:
Single-storey extensions
Double-storey extensions
Wrap-around & side return extensions
Kitchen and dining extensions
Why choose us:
✔ Free site visit and professional consultation
✔ Planning help & permitted development advice
✔ Quality materials & expert builders
➤Get a free extension quote
Starting from the ground up?
We deliver bespoke new build homes across Manchester with superior structural integrity and finish.
Our new build services cover:
Full project planning
Foundations & structural work
Roofing, plastering, electrics & plumbing
Internal & external finishes
➤Discuss your new build project
Full House Renovation
Transform your home completely.
From structural changes to interior finishes, we manage all renovation aspects:
Structural reconfiguration
Electrical & plumbing upgrades
Plastering & tiling
Joinery & decoration
Renovations are tailored to your lifestyle and designed for modern living.
➤Plan your renovation with us
Landscaping & Outdoor Construction
Upgrade your outdoor space.
From patios and driveways to garden features and seating areas — we design and install practical, beautiful landscapes that compliment your home.
Landscaping services include:
Patio & decking installation
Garden paths & borders
Outdoor structures & lighting
➤Free Landscaping Consulation
Garage & Cellar Conversion
Add valuable living space without moving.
Convert underutilised areas into functional rooms such as:
Home offices
Bedrooms
Gyms
Utility spaces
Our conversions include insulation, lighting, flooring, and full finishes.
➤Get your conversion quote
Garden Rooms & Outdoor Living
Extend your home outdoors.
Garden rooms are perfect for home offices, studios, playrooms, or lounges — fully insulated and weatherproof.
Custom garden room builds
Electrical & lighting fit-outs
Durable, quality materials
➤Create your garden room
Loft Conversion & Dormer Extensions
Maximise under-roof space.
Loft conversions and dormer extensions add valuable floor space and can significantly increase your property’s value.
We provide:
Dormer loft conversions
Roof light (Velux) conversions
Insulation & structural work
Full interior finish
➤Book a loft conversion survey
Professionalism, honesty and fairness
Committed To Delivering The Best.
We aren’t just builders — we are Manchester’s trusted construction partner with:
✔ Over 30+ years of combined building experience
✔ Fully insured and compliant with UK Building Regulations
✔ Transparent quotes — no hidden fees
✔ Dedicated project managers
✔ High-quality materials and expert finishes
✔ Real testimonials from satisfied homeowners
- Sustainablility
- On Time
- Modern Technology
- State Of The Art
Our Team
CSCS-QUALIFIED TEAM MEMBERS
KWS BUILDERS
3.7, universal square, Devonshire St, Manchester M12 6JH, United Kingdom
Request a Quote
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Frequently Asked Questions
Some projects fall under permitted development, while others may need planning approval. We guide you through this process.
Yes. The vast majority of our jobs include us sourcing all materials handling all personnel and ensuring that the project is completed to the highest standards. This is inclusive in our service.
Our experience has shown that customers who attempt to project manage multiple tradesman and sourcing materials themselves more often than not turns into a false economy with no savings and increased overall costs. You will have a much better experience contracting a company to complete your project from start to finish.
Yes. We do with this most prospective customers. During the time frame of a project being completed, we build excellent relationships with our customers.
They are usually delighted to show you the projects/work we have completed for them.
Most house extensions take 8–16 weeks, depending on size.
We inspect your loft space and confirm suitability and planning requirements.
Yes — we plan work to minimise disruption wherever possible.