Planning Your Home Extension in 2025: What You Need to Know

A home extension can transform your living space, adding both functionality and value to your property. Whether you need more room for a growing family, want a dedicated home office, or simply wish to enhance your home’s appeal, 2025 is a great time to start planning. Here’s everything you need to know to ensure your project runs smoothly.

Understanding Your Budget

Before you begin, it’s essential to set a realistic budget. The cost of an extension depends on size, materials, and complexity. A single-storey extension can start from around £25,000, while a double-storey extension could exceed £80,000. Remember to factor in hidden costs such as planning fees, structural work, and unforeseen expenses.

If you need financial support, consider remortgaging, taking out a home improvement loan, or using savings. Consulting a professional builder early on will help provide a clearer estimate based on your specific requirements.

Planning Permission & Building Regulations

Understanding whether you need planning permission is crucial. Many extensions fall under permitted development rights, meaning you may not require formal permission. However, larger extensions, those in conservation areas, or those altering the home’s exterior significantly may need approval from the local council.

Building regulations must also be met to ensure safety and compliance. In 2025, energy efficiency and sustainability requirements are stricter than ever, so working with a knowledgeable builder is essential.

Design Trends for 2025

Trends in home extensions are continuously evolving, with 2025 seeing a rise in sustainable and smart-home solutions. Some popular design features include:

• Open-plan living – Seamless transitions between kitchen, dining, and living areas.

• Eco-friendly materials – Using recycled, locally sourced, and energy-efficient materials.

• Smart home integration – Automated lighting, heating, and security systems.

• Maximising natural light – Skylights, bifold doors, and large windows enhance brightness and reduce energy costs.

Finding the Right Builder

Choosing a reliable builder can make or break your project. Look for professionals with strong reviews, relevant accreditations, and a portfolio of completed extensions. (Check out our work) Ask potential builders about their experience, insurance, and warranty policies to ensure peace of mind. A detailed contract outlining costs, timelines, and responsibilities will help avoid misunderstandings.

Project Timeline & What to Expect

A typical home extension can take anywhere from three to six months, depending on complexity. Here’s a rough timeline:

• Planning & Design (4-8 weeks) – Obtaining permissions, finalising blueprints, and budgeting.

• Preparation (2-4 weeks) – Site clearing, material procurement, and initial groundwork.

• Construction (8-16 weeks) – Building, structural work, and installations.

• Finishing Touches (2-4 weeks) – Decorating, flooring, and snagging checks.

  
  

Avoiding Common Pitfalls

To prevent issues like budget overruns or delays, consider:

• Setting aside at least 10% of your budget for unexpected costs.

• Communicating regularly with your builder.

• Getting a detailed contract before work begins.

• Checking for poor workmanship early to address concerns before completion.

Bringing Your Vision to Life

Once construction is complete, focus on final touches like interior decor and landscaping. An extension should complement your home’s existing style while providing the extra space you need.

Get Started Today: Planning Your Home Extension in 2025

If you're planning a home extension in 2025, now is the time to start. Contact us today for expert guidance and a no-obligation quote to bring your dream space to life. Get a quote here