Services Projects About Get a Quote →
Southwater Building Company

Turn Your Garage Into Your Greatest Asset

Specialist garage conversions & building works across West Sussex. Turn your greatest unused asset into a living space you'll love.

150+
Projects Completed
10+
Years Experience
5★
Star Rated
Our Services

What We Build

Featured · Best ROI 🏠

Garage Conversions

Most Popular

Transform wasted space into a stunning living room, home office, gym or annex. Our garage conversions add serious value to your home.

🏗

Extensions

Side returns, rear extensions, two-storeys — we handle the full project from planning and permissions to the final fit-out.

🌿

Landscaping & Patios

From porcelain patios to full garden transformations with feature lighting. We create outdoor spaces you'll love year-round.

🪵

Garden Rooms & Outbuildings

Bespoke timber-frame builds for the garden you've always wanted — designed, project-managed, and built to last.

Our Speciality

Garage Conversions — The UK's Smartest Home Investment

Your garage is your greatest asset waiting to be unlocked. Adding up to 20% to your property value, a garage conversion is the highest-return build you can make in West Sussex right now. At Southwater Building Company, we specialise in turning cold, underused garages into beautiful, functional living spaces — fully project-managed from initial survey through to final handover. Whether you want a home office, a gym, a playroom, an extra bedroom, or a self-contained annex, we design and build a space that works for your family and adds lasting value to your home.

  • No planning permission required in most cases
  • Completed in as little as 4–6 weeks
  • Full building regulations compliance
  • Bespoke design to your brief
Start My Conversion
Garage conversion by Southwater Building Company
Simple Process

How Your Garage Conversion Works

01

Free Survey & Quote

We visit your property in West Sussex, take measurements, discuss your ideas and goals, and provide a detailed, fixed-price quote — completely free and with no obligation. Most surveys are completed within 48 hours of your enquiry.

02

Design & Planning

Our team handles all design decisions, building regulations drawings, and any required applications. We guide you through insulation options, flooring, heating, glazing, and electrics so you get exactly the space you've always wanted.

03

Build & Handover

Our skilled tradesmen complete the conversion — typically in 4 to 6 weeks — with minimal disruption to your household. We manage every trade on site, carry out a full quality inspection, and don't sign off until you're completely happy.

Why Homeowners Choose Southwater

🔒

Fixed Prices

No hidden costs, no nasty surprises. You get a detailed, itemised quote up front — and that's what you pay.

📋

Fully Managed

From planning & design right through to the final finish, we handle every single detail so you don't have to.

Quality Guaranteed

We don't leave until you're 100% happy. Our reputation is built on builds that look incredible and last a lifetime.

★★★★★

"Southwater converted our double garage into a stunning home office and games room. The whole process was seamless — on time, on budget, and the quality is incredible. We honestly can't believe the difference it's made to the house."

— Sarah M., Hampshire

Get Your Free Quote Today

Takes 60 seconds. No obligation. We'll get back to you the same day.

By submitting you agree to be contacted via WhatsApp