Introduction

Thinking about extending your home in 2025? One of the first questions homeowners ask is: How much does a home extension cost? The short answer: The cost of home extensions in the UK usually ranges from £20,000 to £120,000 influenced by factors including size, design and location. Home extension costs in West Sussex will show a minor increase because of demand and regional conditions.

Adding space through home extension improves property value while preventing relocation stress. Effective budgeting requires a thorough understanding of the costs involved. This guide discusses various extension types and explains the hidden costs while also sharing money-saving strategies. By following this guide you will learn how to make knowledgeable choices whether you want to extend your kitchen, convert your loft or build a large addition.

Factors That Affect the Cost of a Home Extension

1. Type of Home Extension

Home extension costs vary based on the specific type of extension being added to your home. The extension type you choose significantly influences its cost. The following provides an approximate financial breakdown for various types of home extensions.

Each extension type serves a different purpose. A single-storey addition provides extra living space while double-storey extensions expand both living space and property value. Homeowners frequently choose kitchen extensions because they enhance both usability and visual appeal.

2. Size and Complexity

While larger extensions tend to have higher costs they also require more complex designs. The cost of a straightforward rear extension remains lower compared to wrap-around or bespoke designs which require extensive structural changes.

3. Materials and Finishes

Material selection has a direct impact on both the visual outcome and financial expense. Premium finishes together with bi-fold doors and tailor-made fittings contribute to increasing the overall cost. Here are some material costs to consider:

• Brickwork: £50 - £150 per m²

• Roofing (flat/pitched): £75 - £200 per m²

• Windows and doors: £1,000 - £10,000 depending on type

• Flooring (wood, tiles, or carpet): £20 - £100 per m²

4. Labour and Location

Labour costs vary by region. Home builders in Bognor Regis charge £200 to £300 daily for skilled workers including electricians and plumbers and bricklayers.

5. Planning Permission and Building Regulations

• Planning permission fees: £206 (if required)

• Building regulations approval: £500 - £2,000

• Structural engineer fees: £700 - £2,500

Hidden Costs to Watch Out For

Many homeowners underestimate additional costs. Homeowners should be aware of these often overlooked costs.

• Architect and Design Fees: £2,000 - £10,000

• Site Surveys & Soil Testing: £500 - £2,000

• Party Wall Agreements (if your extension affects a shared wall): £800 - £2,000

• Utility Relocations: Moving gas, electric, or water lines can add £1,000 - £5,000

• Temporary Accommodation: If major work is involved, renting an alternative home may be necessary

• VAT: Builders usually charge VAT at 20% unless they qualify for reduced rates

How to Budget for Your Home Extension

1. Set a Realistic Budget

Determine your expected expenses which should include materials, labour costs and any unforeseen expenses. Keep a contingency budget of 10-20% to cover unforeseen expenses during your project.

2. Compare Quotes from Home Builders

Secure three estimates from well-known West Sussex home builders to have confidence in receiving a competitive rate. Choose builders who offer complete cost breakdowns for their services.

3. Consider Staged Payments

Builders often provide payment schedules that allow you to make installments instead of a full upfront payment. This can help manage cash flow.

4. Choose Cost-Effective Alternatives

Opt for economical alternatives that maintain high quality rather than premium materials. For example:

• Opt for uPVC windows instead of aluminium.

• Use composite worktops instead of natural stone.

• Choose prefabricated steel beams to reduce structural costs.

5. Explore Finance Options

When facing tight budget constraints you can look into home improvement loans or remortgaging as options to finance your extension project.

Is a Home Extension Worth the Investment?

Absolutely! Adding a well-designed extension to your house can boost your property's value by 10-25%. For example:

• A kitchen extension can add £40,000+ in value.

• A loft conversion can increase property value by 15-20%.

The highest return on investment comes from creating functional spaces such as kitchens and extra bedrooms or open-plan living areas.

Get Your Free Consultation

Are you considering adding space to your house in Bognor Regis? MP Reed LTD delivers custom-made home extension solutions that fit both your requirements and financial limits.

📞 Call us today at 07919484451 or book a free consultation to discuss your project.

💡 Download our FREE Home Extension Guide for expert tips and budgeting advice!

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FAQs

1. Building a simple single-storey extension with standard materials and finishes represents the most affordable construction method.

2. An extension project in Bognor Regis may not require planning permission depending on its scope. Numerous home extension projects qualify for permitted development rights. However, larger projects may require permission.

3. The timeline for building a home extension typically ranges from three to six months based on its size and complexity.

4. You can continue to live at home during construction but prepare for disruptions. Major construction work may require you to find temporary living accommodations.

For more insights, check out these authoritative sources:

• Planning Portal - UK Government

• RICS - Home Extensions Guide

By following this guide, you’ll be well-prepared to plan and budget for your home extension in 2025. Contact us today to start your project!