Rear House Extensions in Surrey: Your Complete Guide with KT5 Construction
Thinking about expanding your home with a rear house extension? Whether you’re in Surrey, within the M25, or surrounding London areas, KT5 Construction—your trusted local builder in surrey—brings the expertise and guidance you need to maximise your space. Rear house extensions offer the ideal solution for homeowners looking to enhance their lifestyle, create an open plan kitchen, or simply increase property value.
Why Choose a Rear House Extension in Surrey ?
Rear extensions are one of the most sought-after home improvement projects in the UK. With KT5 Construction’s expertise, we tailor each extension to your lifestyle and property type.
Key Benefits:
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- Adds up to 15% value to your property
- Ideal for a kitchen extension or family room
- Suitable for terraced, semi-detached, or detached houses
- Enhances natural light with bi-fold doors, glazed windows, or skylights
- Improves your home’s EPC rating and energy efficiency
Popular Types of House Extensions
Single-Storey Rear Extension
Perfect for expanding kitchens, dining areas or utility spaces with features like underfloor heating and crittall doors.
Double-Storey Rear Extension
Add bedrooms or bathrooms above your rear build while keeping within permitted development limits.
Side Return House Extension
Utilise the narrow alley beside your home to create a spacious, light-filled open plan kitchen.
Wraparound House Extension
Combine side return and rear extensions to create a seamless, expansive ground floor house extension.
Understanding Costs: Use Our Extension Cost Calculator
The cost of a rear extension varies based on scope, materials, and location.
Average Costs (per m²):
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- London & Surrey: £1900 to £3000
- Rest of UK: £1650 to £2600
Cost Breakdown:
- 30% Construction labour
- 20% Materials
- 20% VAT
- 15% Glazing (bi-fold doors, sliding doors)
- 4% Architectural design
Use our instant cost calculator to get a personalised quote with in 60 Seconds.
Planning Permission & Permitted Development for Rear Extension In Surrey
Depending on size and location, your rear extension may fall under permitted development.
Permitted Development Guidelines:
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- Max depth: 6m (terraced/semi-detached), 8m (detached)
- Max height: 4m for single-storey
- No more than 50% of land surrounding the property
If your project exceeds these limits, KT5 can assist with a planning application or lawful development certificate.
Regulations to Know
Your build must meet UK building regulations:
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- Structural integrity
- Electrical and fire safety
- Energy performance (thermal envelope, insulation)
- Drainage and ventilation
We manage every aspect for full compliance and peace of mind.
Common Features to Consider
Interior Upgrades:
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- Utility area with washer/dryer
- Kitchen island with breakfast bar
- Open-plan layout with custom lighting
Roofing Options:
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- Flat roof extension with lantern
- Pitched roof extension with Velux windows
Frequently Asked Questions
How long does a rear house extension in Surrey take?
7–15 months from concept to completion.
Do I need to inform my neighbours?
Yes, through a Neighbour Consultation Scheme or Party Wall Agreement.
Can KT5 help with design?
Absolutely. We provide architectural design and full project management.
Why KT5 Construction for rear house extensions in Surrey ?
With a strong reputation for quality and reliability, KT5 Construction is based in the heart of Surrey near the M25. We offer:
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- Transparent pricing.
- Fully insured & accredited builders.
- Award-winning home renovation solutions.
- Local knowledge of Surrey and London boroughs.
Ready to Transform Your Home?
Don’t wait to create your dream space. Contact KT5 Construction today for a free consultation and start your rear house extension with a team that understands your needs.
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