What We Build

Composite Garden Rooms,
Designed For Real Life.

A range of standard sizes plus fully bespoke options — all built with the same Leka GRP composite system. All sizes installed in days, not weeks, with a 40-year structural warranty.

The Range

A Space for Every Need.
Every Garden.

Available in a range of sizes and configurations, every NextGen Garden Room is built to the same standard — composite GRP structure, premium insulation, and a clean modern finish that looks as good in 10 years as it does today.

6 × 4m Garden Room

Our best-selling size — versatile enough for a home office, games room, or gym. Full-height sliding doors, premium cladding, and a composite flat roof. Installed in 3–4 days.

4 × 3.5m Studio

Ideal for home offices, artist studios, or a private retreat. Same GRP composite construction, smaller footprint — perfect for more compact gardens.

Custom Sizes Available

Need something non-standard? We work with you on bespoke configurations — different dimensions, cladding finishes, and roof options to match your garden and home.

Why Composite GRP?

Better Than Timber.
Better Than Metal.
Built to Last.

Traditional garden rooms use timber or metal — both compromise over time. Our GRP composite system has no organic material to rot, no metal to corrode, and no thermal bridges to create condensation. Just a structure that performs as well in year 20 as on day one.

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100% Composite GRP Construction

No timber, no aluminium, no metal in the structure. The GRP framework is structurally tested, water-resistant, and thermally efficient — nothing to rot, corrode, or absorb moisture.

Industry-Leading Insulation

Premium insulation throughout walls, roof and floor delivers U-values that outperform timber-framed alternatives — keeping the room warm in winter and cool in summer, every year.

Installed in Days, Not Weeks

Factory-built precision modules arrive ready to assemble. Most installations complete in 2–4 days — minimal disruption, maximum quality, and a definite programme before we start.

Year-Round Living

A Room You’ll Use
Every Single Day.

Unlike a timber shed or an extension, a NextGen Garden Room is warm, dry, and usable in every season — making it a genuine addition to your living space, not just a garden feature.

Warm in Winter. Cool in Summer.

✓Industry-leading U-values across walls, roof and floor
✓No cold spots, no condensation, no damp floor
✓Dramatically lower running costs than a heated timber building
✓Comfortable in sub-zero temperatures without a full heating system

A Clean Install. Minimum Disruption.

✓No excavation — adjustable ground screws, not concrete foundations
✓Perfect for limited access — side gates, narrow passages, no problem
✓Pre-fabricated modules mean on-site time is assembly, not construction
✓Your garden left tidy — not a building site — from day one

Ready to Build Your Garden Room?

Get a free, no-obligation quote. We’ll survey your garden, talk through the options, and give you a clear price — no surprises.