Beautiful Garden Rooms, Built for Real Life
Create the extra space you need without moving home. Designed, built and installed by local experts you can trust.
40+
Years Experience10 Year
GuaranteeFully Insured
& AccreditedLocal Team
You Can Trust
Bring Your Garden Room Vision to Life
YOUR OWN SPACE, RIGHT AT HOMEFrom design to completion, we create fully insulated, bespoke spaces built around how you want to live.
Rated 4.5 out of 5 on Google
Based on 131 Google reviews from customers across Northern Ireland.
Flexible Extra Space
Garden rooms can be used as a home office, studio, gym, playroom or quiet space away from the main house.
Comfortable Year Round
Built with quality insulation, glazing and finishes to help keep the space warm, bright and practical in every season.
Designed Around You
Choose a layout, size and finish that suits your garden, your home and how you plan to use the room.
Built to Last
Durable materials and professional installation give you a strong, low-maintenance garden room made for everyday use.
Versatile Spaces For Work, Life & Relaxation
Our garden rooms are fully insulated, beautifully finished and built to the highest standards. Whether you need a home office, gym, studio or space to relax, we'll design and build a garden room that suits your needs, budget and lifestyle.
Year-round comfort with premium insulation
Bespoke designs to suit your garden and home
Built to last with quality materials and expert installation
Local team with 40+ years of experience
Home Offices
A quiet, productive space to work from home.
Gyms
Your own private fitness space.
Studios
Perfect for hobbies, creativity and music.
Relaxation
A peaceful retreat to unwind and recharge.
Designed Around Your Space
Every garden is different. That's why we offer a range of sizes and layouts to suit your requirements. All our garden rooms are fully bespoke, crafted to complement your property and lifestyle.
Compact
2.5m x 2.5mIdeal for a garden office or studio.
Medium
4.0m x 3.0mPerfect for multi-use spaces.
Large
5.0m x 3.5m+Great for home gyms, offices or family rooms.
Custom
Made to MeasureTailored to your garden and needs.
POPULAR EXAMPLE SIZES
- 2.5m × 2.5m
6.25m²
- 3.0m × 3.0m
9.00m²
- 4.0m × 3.0m
12.00m²
- 5.0m × 3.5m
17.50m²
- 6.0m × 4.0m
24.00m²
All sizes are approximate and can be customised to suit.
ACCESS REQUIREMENTS
We’ll need access to the garden for materials and equipment. Typical access requirements:
✔ Minimum 900mm side access
✔ Clear path to the installation area
✔ Our team will confirm access during the survey
Everything You Need
Fully insulated walls, roof and floor
Choice of external cladding and colours
High-performance double glazed windows and doors
Interior plastered finish (ready to paint)
Premium flooring (choice of finishes)
Electrical installation with consumer unit
LED downlights as standard
Heating (electric panel heaters)
10 Year Insurance Backed Guarantee
Most garden rooms are completed within 1 – 3 weeks from start to finish.
Premium Materials. Expert Craftsmanship.
Foundations
Built on a strong, level ground pile base for maximum durability and stability.
Insulation
High-performance insulated walls, floor and roof for 365-day thermal comfort.
Roofing Options
Choose from EPDM seamless rubber, tile-effect or insulated flat roof systems.
Heating
Slimline electric panel heaters as standard with optional underfloor heating upgrades.
Electrical
Ample double sockets, interior LED downlights, external lights and network data points.
Plumbing (Optional)
Add an optional sink, WC, kitchenette or shower room for ultimate independence.
Exterior Finishes
Choice of natural cedar timber, composite cladding and contemporary colours.
Windows & Doors
Thermally broken aluminium bi-fold or double-glazed sliding patio doors.
“Brilliant company from start to finish. Very competitively prices. No mess No fuss just steady work from Bobby and his team. They were just superb. No cold/too hot conservatory now a lovely sunroom which can be used all year round. No hesitation in recommending this company at all.”
Sharyn Fenton“Fantastic job completed in two days and now a room that can be enjoyed all year round. Complete job done exactly as described with a very dedicated team. Thoroughly recommend Advance NI.”
Siobhan McAdam“Thanks to everyone for all your hard work from a very happy customer! All your staff are a credit to your company. Brilliant job!”
Alison ClarkeEverything You Need To Know
Have questions about planning, installation, or guarantees? Find quick answers below.
In most cases, garden rooms fall under Permitted Development rights and do not require planning permission provided they are single-storey, under 2.5m in height at the boundary, and do not cover more than 50% of your garden area. Our team will verify exact site details during your free home survey.
Yes! We can include optional plumbing for sinks, toilets, shower rooms, or kitchenettes. We connect directly to your existing home drainage and water mains.
All Advanced NI garden rooms come backed by our comprehensive 10 Year Insurance-Backed Guarantee for structure, roof, and double glazing, giving you total long-term peace of mind.
We typically use ground pile or concrete pad foundations depending on your garden ground conditions. This elevates the timber structure slightly to prevent damp and provides rock-solid stability without requiring massive garden excavation.
Most garden rooms are fully built and handed over within 1 to 3 weeks from start to finish on site. Because components are precision pre-crafted, disruption to your home is kept to an absolute minimum.
Absolutely. Every single garden room we build is bespoke. You can choose cladding styles (red cedar, composite, anthracite grey), window and door positions, interior flooring, lighting layouts, and heating options.