Liverpool & Wirral
Expert Home Extensions Designed Around Your Life
Built to last generations. From concept to completion.
More space. More light. More value.
Family-run. 40+ years experience. Design-led.
A home extension is the smartest investment you can make — without the stress of moving. At Glassar Projects, we handle everything from architectural design and planning permission through to the final finishing touches. We’re not just builders — we’re designers who build.
Interactive Tool
Design Your Extension in 3D
Choose your house type, pick your extension, select materials and features — then see it come to life in 3D. Get an instant cost estimate and project timeline.
Your Extension, Your Way
Every Home is Different. We Design Bespoke Extensions Tailored to You.
Single-Storey
Open-plan kitchen-diners, garden rooms, and living spaces that flood your home with natural light.
Two-Storey
Extra bedrooms, bathrooms, and living space on both floors — the ultimate home transformation.
Wraparound
Total ground-floor transformations that completely reimagine how your home works for your family.
Rear Extensions
Extend into your garden for a bigger, brighter home with seamless indoor-outdoor living.
Garage Conversions
Home offices, gyms, and playrooms — unlock the hidden potential of your unused garage space.
How We Work
Three Simple Steps to Your Dream Extension
We start with a conversation about how you want to live. Our design team creates detailed architectural plans, handles planning permission with Liverpool City Council, and produces 3D visualisations so you can see your extension before a single brick is laid.
Our skilled tradespeople handle every aspect — foundations, brickwork, steelwork, roofing, plumbing, and electrics. We project-manage the entire process with weekly updates and a dedicated site manager. No subcontractors, no surprises.
We handle all plastering, decorating, and final fittings — leaving you with a beautifully finished space ready to live in. From underfloor heating to bi-fold doors, skylights to kitchen islands, every detail is handled with precision.
Ready to Start Your Project?
Get a personalised quote in 30 seconds. No obligation, no pressure — just honest pricing from a family business.
Investment Guide
How Much Does a Home Extension Cost?
Every project is unique, but here’s a guide to help you budget. These are average costs for the Liverpool and Wirral area in 2024–2025, including all labour and materials.
| Extension Type | Typical Cost | Timeframe |
|---|---|---|
| Single-storey rear (3m–6m) | £35,000 – £65,000 | 8–12 weeks |
| Two-storey extension | £55,000 – £110,000 | 12–18 weeks |
| Wraparound extension | £60,000 – £120,000 | 14–20 weeks |
| Garage conversion | £15,000 – £30,000 | 4–6 weeks |
| Loft conversion | £40,000 – £70,000 | 6–10 weeks |
Frequently Asked Questions
Let’s Build Something Amazing Together
Use our Quick Quote Calculator to get an instant estimate, or get in touch to discuss your project with our team.