A house extension is a huge investment in your home, so you will more than likely have many questions before you want to get the process underway.

With over 11 years of experience providing bespoke home extensions, JVB Construction can advise on every aspect of the design, planning and construction process. Our team have compiled a list of the most common frequently asked questions asked by our clients.

Do I need planning permission for a house extension?

Whether or not you require planning permission for your house extension will depend on the size and type of the extension you want to build.

In general, a small extension such as a porch or a single-story rear extension that meets certain requirements may be considered permitted development and won’t require planning permission. However, larger or more complex extensions may require planning permission. You should always check with your local planning authority before starting any construction work.

How long does planning permission take for a house extension?

Once you have submitted your application to your local authority, the planning permission process will take on average of 8 weeks. You should also allow between 6 and 8 weeks to prepare and submit the plans. Therefore, it is advisable to begin the entire process at least 4 months before your ideal start date.

How much does a house extension cost?

The cost of a house extension can vary widely depending on several factors such as the type of extension, materials used, and labour costs.

On average, you can expect to pay around £1,000 to £2,000 per square meter for a basic extension, while more complex extensions or those using high-end materials can cost upwards of £3,000 per square meter. It’s important to budget for unexpected costs, as they can arise during the construction process.

How long does it take to complete a house extension?

The timeline for completing a house extension will depend on several factors, such as the size and complexity of the project, the weather conditions, and the availability of materials and contractors.

As a general rule, a small extension may take around 2-3 months to complete, while larger and more complex extensions can take 6-9 months or more.

How close to my boundary can I build an extension?

You have a legal right to build up to the boundary line of your property, subject to planning permission and complying with all the requirements of the Party Wall Act 1996.

What is the maximum extension without planning permission?

If you do not obtain planning permission, the maximum extension size is 6 metres for terraced and semi-detached properties and 8 metres for detached properties. This would need to be approved under Prior Approval, which is an extension of Permitted Development rights.

Will I need an architect or designer for my house extension?

It is recommended to work with an architect or designer when planning a house extension. They will help you to create a design that meets your needs and maximises the use of available space while ensuring that the extension complies with local planning and building regulations.

Architects and designers can also help you find the right contractors and oversee the construction process to ensure that everything runs smoothly.

How do I choose a builder for my house extension?

Selecting the right builder for your house extension is very important. When choosing a builder for your house extension, it’s important to check their experience, qualifications, references, and insurance. You should also ask for a written contract that details the scope of the project, the timeline, and the payment schedule.

You should carry out in-depth research first before even approaching the potential builders for more information. Being as informed as possible about what you want and the different options you have will allow you to feel more confident when the time to pick a builder arrives. This is because you will understand what is needed to complete the work, as well as what your expectations are.

Can you extend an extension?

It is definitely possible to extend an existing extension, but it can be a complex process that is dependent on the age, size and design of the current extension. It is usually simpler and more cost-effective to just demolish the old extension and start from scratch.

If you are planning an extension, renovation or new build in Surrey, contact us today for a no-obligation quote and more information.