The Real Cost of Home Extensions in Norfolk: 2025 Pricing Guide

A home extension is one of the best ways to add space, comfort, and long-term value to your property — but understanding the true cost can be challenging. Prices vary depending on size, complexity, materials, and the type of extension you choose. This guide breaks down realistic 2025 extension costs for homeowners in Norfolk so you know exactly what to expect before starting your project.

1. Average Extension Costs in Norfolk (2025)
As a general rule, Norfolk extension prices fall within these ranges:

• Basic single-storey extension: £1,800 – £2,300 per m²

• Mid-range single-storey extension: £2,300 – £2,900 per m²

• High-spec single-storey extension: £3,000 – £3,800 per m²

• Double-storey extension: £2,500 – £3,500 per m² (lower cost per m² because foundations/roof are shared)

These figures include labour and materials but exclude kitchens, bathrooms, and specialist finishes.

2. What Affects the Cost?

Size & Layout
Larger builds may offer better value per square metre, but total cost will rise with size.

Complexity of Design
Roof style, structural steels, glazing walls, and bespoke design elements all raise prices.

Material Choices
Budget, mid-range, and premium finishes vary significantly. For example:

• Standard bi-fold doors vs. aluminium slimline systems

• Standard roof tiles vs. premium clay tiles

• Brick match quality (important for Norfolk homes)

Ground Conditions
Soil type, drainage modifications, and foundation depth can alter cost quickly.

Planning Permissions & Surveys
Some extensions fall under permitted development, but others require full planning, structural engineering, or building control input.

3. Additional Costs Homeowners Often Forget

• Architectural drawings: £800 – £2,500

• Structural engineer calculations: £400 – £1,200

• Planning application fees: ~£250

• Party wall agreements (if needed): £800 – £1,500

• Kitchen/bathroom installation

• Flooring and decorating

• Contingency budget: 10–15%

A good builder will highlight potential extras before work begins.

4. How Long Does an Extension Take in Norfolk?

• Single-storey extension: 10–14 weeks

• Double-storey extension: 12–20 weeks

• Heavy structural changes: 16–24 weeks

Weather, approvals, and material lead times can affect schedules.

5. How to Keep Your Costs Under Control

• Finalise your design before building begins

• Avoid last-minute specification changes

• Choose standard-sized doors and windows where possible

• Ask for a clear payment schedule

• Work with an experienced Norfolk builder who explains costs clearly

6. How Much Value Can an Extension Add?

A well-built extension can add:

• 10–25% to your property value

• More for open-plan kitchen/diner extensions

Norfolk’s property market continues to grow, meaning extensions remain a strong investment.

Final Thoughts

A home extension is a major project, but with transparent pricing and the right team, it can transform your home and significantly increase its value. Knowing what to expect financially ensures you can plan confidently and avoid surprises.

Call to Action

If you're planning a home extension in Norfolk and want accurate pricing, honest guidance, and high-quality workmanship, contact Reeve & Son Construction today for a free consultation.