House extensions are a fantastic way to add space and value to your home, but understanding the costs involved is essential to planning your project effectively. At KT5 Construction, we specialise in delivering exceptional house extension services across London, Surrey, and the surrounding areas of the M25.

This guide provides a detailed breakdown of house extension costs, factors influencing pricing, and tips to help you save money.

Types of House Extensions and Their Costing

1. Single-Storey Extensions

• • Ideal for additional living or kitchen space.
  • Average cost: £1,500–£2,500 per square metre.

2. Double-Storey Extensions

• • Adds bedrooms and bathrooms, providing more value.
  • Average cost: £2,000–£3,000 per square metre.

3. Wraparound Extensions

• • Combines side and rear extensions for maximum versatility.
  • Average cost: £2,000–£3,500 per square metre.

4. Side Return Extensions

• • Utilises underused outdoor space for functional areas.
  • Average cost: £1,800–£2,500 per square metre.

5. Loft Conversions

• • Perfect for additional bedrooms or home offices.
  • Average cost: £1,000–£2,000 per square metre.

Factors Influencing House Extension Costing

1. Size and Design
   Larger extensions with complex designs incur higher costs due to materials and labour.
2. Materials Used
   Premium materials like hardwood or bespoke fittings will increase the budget.
3. Planning Permission and Building Regulations
   Fees for planning applications and meeting building regulations add to the cost.
4. Labour Costs
   Skilled professionals, including architects, builders, and engineers, can impact overall expenses.
5. Site Preparation
   Clearing debris, levelling ground, and addressing drainage issues add to upfront costs.

Regional Variations in Extension Costing

Urban Areas:
Labour and material costs tend to be higher in cities such as London due to demand.

Rural Areas:
Transportation fees for materials can increase costs in remote locations.

KT5 Construction ensures competitive pricing while maintaining quality, regardless of your location.

Cost Breakdown Table for House Extensions

Why Choose KT5 Construction for Your House Extension?

• • Expertise and Experience: Over a decade of building high-quality house extensions.
  • Comprehensive Services: From design to completion, we manage every aspect of your project.
  • Transparency: Clear pricing with no hidden costs.
  • Tailored Solutions: Customised designs to match your lifestyle and needs.
  • Wide Coverage: Serving London, Surrey, and areas within the M25.

How to Save Money on House Extensions

1. Plan Thoroughly: Avoid last-minute changes to minimise extra costs.
2. Choose Cost-Effective Materials: Opt for quality materials that suit your budget.
3. Use Local Builders: KT5 Construction offers affordable services without compromising on quality.
4. Measure Accurately: Prevent wastage by calculating material requirements correctly.

Frequently Asked Questions

Q: How do you calculate the cost of an extension?
A: Costs are based on size, design, materials, and location. Use KT5’s free cost calculator for an instant and accurate estimate.

Q: How much should I budget for a house extension?
A: Budget £1,500–£3,500 per square metre, depending on the type and complexity of the extension.

Q: Is £50k enough for an extension?
A: Yes, for smaller or single-storey extensions, but larger projects may exceed this budget.

Q: How much would a 20m² extension cost?
A: Expect to pay £30,000–£70,000, depending on materials and labour.

Conclusion

Costing house extensions requires careful planning and consideration of various factors. With KT5 Construction, you can achieve your dream extension with transparent pricing and expert craftsmanship. Contact us today for a free quote, or use our Cost Calculator to estimate your project budget accurately!