Central Scotland's Trusted Extension Specialists
House Extensions in Glasgow & Central Scotland
Precision-Built, Director-Led & Fully Project-Managed — From Design to Completion.
Single & Double Storey Extensions
Full Planning & Warrant Support
All Trades In-House (No Subcontract Chaos)
Transparent Pricing + Itemised Quotes
The GS Contracts Difference
Why Choose GS Contracts for Your House Extension?
Glasgow’s Trusted Extension Builders — 15+ Years of Proven Results
All in One Service
Groundworks to finishing — one team, one schedule. No juggling multiple contractors.
Transparent Pricing
Itemised quotations with full cost breakdowns. No hidden extras, no surprises.
15+ Years of Experience
Zero abandoned projects in our entire history. We finish what we start.
Family-Owned & Director-Led
Crafted with FSC-certified recycled wood fibres and high-density polyethylene.
Quality Handover
Receive detailed handover documentation, structural and workmanship guarantees
Local Service
Based in Cumbernauld, serving the Central Belt of Scotland.
A Messgage From Graeme
“A home extension is a major investment, and you deserve a builder who treats it with the care and respect it deserves.
As a family-run business, our reputation means everything. My team and I handle every project with precision, honest communication and dependable workmanship. Whether you’re expanding for family life, modern open-plan living, or adding value, we’re here to help you build it the right way.”
Graeme Scott
Managing Director
Our Commitment to You
The GS Contracts Promise
Every project backed by our unwavering commitment to quality, transparency, and professionalism.
Clear Scope & Cost Transparency
Structural & Workmanship Guarantee
Fully Insured and Health-and-Safety Compliant
Agreed Start & Target Completion Dates
Weekly Progress Updates
Direct Director Involvement Throughout
Features
"We treat every project as if it were our own home. That's the GS Contracts way."
Our Expertise
Our House Extension Services Include
From concept to completion, we handle every aspect of your home extension project.
Single Storey Extensions
Perfect for expanding living space without major structural changes.
Double Storey Extension
Maximise your home's potential with additional rooms on two levels.
Rear
Extensions
Extend into your back garden for extra living or dining space.
Side Return Extensions
Transform wasted side space into functional living areas.
Kitchen
Extensions
Create the open-plan kitchen-diner you've always dreamed of.
Multi Room
Extensions
Complex projects with multiple rooms and bespoke layouts.
Planning & Building Warrant Assistance
Full support with drawings, engineering, and council submissions.
Full Project
Management
We coordinate every aspect, every trade, every inspection.
Recent Projects in Glasgow & Central Scotland
See the quality and attention to detail we bring to every house extension.
PROJECT
Bishopbriggs Family Extension (Glasgow Area)
The Challenge:
Poor ground conditions, tight access constraints, and heavy steelwork requirements
The Result:
Completed in 10 weeks with seamless open-plan living space creation
Over the moon with the finished result. GS Contracts made our vision reality."
— Homeowner
10 week completion
Zero delays
Full structural integration
What Our Customer Are Saying
House Extension FAQs
Get answers to the most common questions about house extensions in Central Scotland.
How long does a typical extension take?
Most single-storey extensions take 6-8 weeks, while double-storey projects typically require 10-14 weeks. Timeline depends on size, complexity, and weather conditions. We provide a detailed schedule during the proposal stage.
Do I need planning permission or just a building warrant?
Many extensions fall under 'permitted development' and only need a building warrant. However, larger projects or properties in conservation areas may require full planning permission. We assess your specific situation and handle all necessary submissions.
What the average cost of an extension?
Costs vary significantly based on size, specification, and complexity. Single-storey extensions typically start from £1,500-£2,000 per square metre. We provide transparent, itemised quotes with no hidden costs after our free site assessment.
Can I live at home during the build?
Yes, most clients remain in their homes during construction. We minimise disruption through careful planning, clean work practices, and clear communication. For kitchen extensions, we can arrange temporary cooking facilities.
Do you manage trades and inspections?
Absolutely. We coordinate all trades, materials, and building inspections. Our in-house team handles groundworks, brickwork, carpentry, and finishing. We also manage specialist trades like electricians and plumbers when needed.
Simple & Transparent
How It Works
From first contact to final handover, we make the entire process clear and stress-free
Free Site Visit & Consultation
We assess your goals, space constraints, and vision for the extension.
Detailed Proposal & Cost Breakdown
Transparent scope, timeline, and itemised costs — no hidden surprises.
Ready to Plan Your Extension?
Contact us today for a free site assessment and transparent quotation.
Start Your Extension Journey Today
Get expert advice, a transparent quote, and a clear plan of action.
Call Us Direct
Email Us
Serving Glasgow, Cumbernauld, Lanarkshire, Falkirk, Stirling & the Central Belt
Response Guarantee
We respond to all inquiries within 24 hours and can typically schedule site assessments within 48-72 hours.
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