How To Plan An Extension

By Truffle Mortgages

February 23, 2023

Planning an extension can be an exciting but daunting project but by adding more space to your property, you can increase its value and meet the changing needs of your family.

However, planning an extension requires careful consideration and planning to ensure that the project meets your requirements, stays within budget and complies with local regulations.

Therefore, to give you a brief overview of what’s involved, we’ll outline the process of planning an extension step by step in this article.

The Steps Involved To Plan An Extension

1. Identify Your Needs

Before starting the planning process, it’s essential that you identify your reasons for wanting an extension. This’ll help you to determine what type of extension you need and what features it should include.

You might want to extend your kitchen to create a larger dining area, add a new bedroom for a growing family or create a home office. Therefore, you’ll want to make a list of your priorities and determine what kind of space you need.

2. Determine Your Budget

Once you’ve identified your needs, you’ll need to determine your budget. Setting a budget early on will help you to determine what kind of extension you can afford and prevent you from overspending. When determining a budget, you’ll want to be realistic and factor in additional costs such as planning permission fees, architect fees and building regulations.

If the budget for your dream extension may be a problem, you may want to consider a home extension loan. This type of loan can be used for all types of home improvements such as new extensions, kitchens, bathrooms and so much more. If this is something you’ll require, you need to speak with a mortgage advisor such as ourselves to see if you are eligible.

3. Consider the Design

The design of your extension is an essential factor to consider when planning. Your extension should blend in with the existing architecture of your home and be aesthetically pleasing. You’ll also need to consider the size and shape of your extension as well as the materials and finishes you’d like to use. Another design feature you’ll need to consider is any plumbing or electrical work inside of the property. For example, you may want to consider moving your boiler to free up some space.

4. Consult with an Architect

Consulting with an architect is crucial in the planning process because they can provide valuable advice on the design of your extension and ensure that it meets local planning regulations. They can also help you to create a detailed plan and provide you with a cost estimate for the project. Although an architect can cost a few thousand to hire, they are always worth consulting to ensure that your extension goes to plan.

5. Obtain Planning Permission

Before you can start construction on your extension, you’ll need to obtain planning permission, which can be a lengthy process and take up to eight weeks. You’ll need to submit a detailed plan of your extension, including its design, size and location. If your extension meets local regulations, you’ll be granted planning permission.

6. Hire a Builder

Once you’ve obtained planning permission, you can start looking for a builder to construct your extension. It’s essential to choose a builder with experience in building extensions and who is reputable. Ideally, you’ll want to obtain quotes from several builders and choose the one that offers the best value for money.

7. Obtain Building Regulations Approval

In addition to planning permission, you’ll also need to obtain building regulations approval. This ensures that your extension complies with local building regulations and meets minimum safety standards. Your builder can apply for building regulations approval on your behalf and an inspector will visit the site to ensure that the work is carried out to a high standard.

8. Start Construction

Once you’ve obtained planning permission and building regulations approval, you can start construction on your extension. Your builder will work closely with you to ensure that the project is completed on time and within budget. It’s essential to communicate regularly with your builder to ensure that you’re happy with the progress of the project.

9. Finishing Touches

Once construction is complete, you can add the finishing touches to your extension. This might include painting and decorating, laying flooring and installing fixtures and fittings. You’ll also need to ensure that all the work is completed to a high standard and meets local regulations.

10. Enjoy Your New Space

Finally, once all work is complete, you can enjoy your new space. Your extension will provide you with additional living space and you can use it for whatever purpose you like.


Planning an extension for your home can be a complex process but by following the steps outlined in this article, you can ensure that your project is successful. If you require further information regarding financing a house extension, feel free to get in touch and we will try to provide our assistance where possible.