SINGLE STOREY EXTENSION LONDON
H1: Single Storey Extension London – Rear, Side & Kitchen Extensions | LASTING LTD
A single storey extension is one of the most effective ways to increase ground-floor space, improve natural light and create a modern open-plan layout.
LASTING LTD specialises in designing and building high-quality single storey extensions across London — including rear extensions, side extensions and kitchen extensions.
Enhanced living space • Fast construction • High property value increase
Fully insured • NHBC-registered • Free site visit & quotation
Why Choose a Single Storey Extension?
Single storey extensions offer excellent flexibility and strong return on investment:
Create a large open-plan kitchen/living area
Add 15–40 m² of usable space
Perfect for bifold or sliding doors
Ideal for modern layouts & more natural light
Increase property value by up to 20%
Works well for terraced, semi-detached & detached homes
Ideal for:
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Kitchen diners
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Family living rooms
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Utility rooms
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Home offices
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Playrooms
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Open-plan layouts
Why Homeowners Choose LASTING LTD
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10+ years of extension building experience
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Structural steel (RSJ) works included
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Planning & Building Control assistance
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Full project management
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Transparent fixed pricing
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Premium quality finishes
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Clear communication and dedicated site manager
CTA: Get a Free Single Storey Extension Quote
Types of Single Storey Extensions We Build
1. Rear Single Storey Extension
The most popular option in London.
Perfect for:
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Luxury kitchen diner
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Large open-plan living
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Skylights & roof lanterns
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Rear sliding or bifold doors
2. Side / Side-Return Extension
Ideal for Victorian and Edwardian homes with side gaps.
Benefits:
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Expands narrow kitchens
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Adds valuable floor space
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Allows large glazing & natural light
3. Kitchen Extension
The best way to build a modern open-plan kitchen diner.
Can include:
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Kitchen island
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Feature skylights
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Underfloor heating
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Premium sliding doors
4. Single Storey Wrap-Around Extension
For maximum space and luxury.
Creates:
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Huge open-plan layout
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Room for dining + lounge + kitchen
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Utility room + WC options
What’s Included in Our Single Storey Extensions
STRUCTURAL WORKS
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Excavation & foundations
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Drainage upgrades
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RSJ steel beams
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Load-bearing wall removal
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Blockwork / brickwork construction
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Flat or pitched roof (optional lanterns)
EXTERNAL WORKS
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Bifold / sliding / French doors
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Roof lights & skylights
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Insulation & waterproofing
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Render, brick slips, or cladding
INTERNAL WORKS
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Electrical rewiring & lighting
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Plumbing & heating
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Underfloor heating (optional)
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Plastering, flooring, painting
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Kitchen installation (optional)
MANAGEMENT
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Drawings (optional)
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Structural engineering
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Building Control support
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Weekly progress updates
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Snagging & final certificates
Single Storey Extension Cost in 2025 (London Market)
| Extension Type | Typical Cost |
|---|---|
| Rear Single Storey (15–25 m²) | £35,000 – £55,000 |
| Medium Rear / Kitchen Extension (25–35 m²) | £45,000 – £65,000 |
| Large Rear Extension (35–45 m²) | £60,000 – £80,000 |
| Side-Return Extension | £25,000 – £45,000 |
| Single Storey Wrap-Around | £70,000 – £110,000 |
Prices include: Labour & materials Structural steel Glazing Plumbing, electrics, heating Flooring & decorating Project management
CTA: Request a Personalised Price Estimate
Timeline for a Single Storey Extension
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Planning & design: 2–6 weeks
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Groundworks & structure: 3–6 weeks
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Roofing & glazing: 1–3 weeks
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Interior finishing: 3–6 weeks
Typical total: 8–14 weeks
Benefits of Working With LASTING LTD
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High-end construction & finishing
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Experienced structural team
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Clean and efficient work
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No hidden extras
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On-time delivery
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Excellent communication
Areas We Cover
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North London
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East London
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Enfield
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Barnet
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Haringey
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Edmonton
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Walthamstow
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Palmers Green
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Finchley
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Muswell Hill
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Tottenham
Related Services:
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House Extension London
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Wrap-Around Extension
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Double Storey Extension
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Kitchen Renovation
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Structural RSJ Installation
Related Areas:
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Builder in North London
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Builder in Barnet
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Builder in Enfield
Start Your Single Storey Extension Project Today
Transform your home with a modern open-plan extension delivered by expert London builders.
CTA:
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Get a Free Quote
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WhatsApp Us (Fast Response)
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Book a Site Visit
