A Beginner’s Guide to Building a House Extension

One of the common home improvement projects homeowners take is building an extension. Home extensions are known to add much-needed value and space. From the costs through design, planning permission, and finance, there are different things you ought to consider when building an extension. Builders in Brentwood Essex will ensure that your extension passes planning and meets your needs. This guide will help you understand the process of building an extension.

Need for Building an Extension

house extensionWhen moving to a new house, there are legal fees, agent fees, and stamp duty, and the premium for an extra bedroom. Also, you can find that a decent extension will offer both space and value for your home. Therefore, if you are planning to sell your home soon, you should consider adding an extension.

What to Consider Before Extending

Shared Walls

If the building involves digging or building foundations within 3m of the boundary, party wall structure or party wall, or even digging foundations, the work requires complying with the necessary laws such as Party Wall Act.

Site Access

There is a need to factor how trucks, lorries, and deliveries will reach your property and unload heavy materials and items. Moreover, you need to determine where the trades park and store their equipment and tools.

Demands on Your Boiler

Will the existing boiler cope with the demands of a new extension? When replacing the boiler, you ought to look for other alternatives like underfloor heating.


You ought to notify your insurance company of the ongoing works. Some insurance companies can offer cover during works, but others provide dedicated insurance extension products.

Other Considerations

There are other things you will need to consider before you get design works for the extension. They include soil conditions, surrounding trees, services, and soil conditions.

Cost of Building an Extension

home extensionJust like any other project, the cost of building an extension will come down to various factors such as specification, size, and location. Depending on your location, the cost will vary accordingly. Ideally, a two-story will cost more than a regular extension. Also, you have to take into account extra interior finishes and fixtures. A foundation and roof are a must even if your extension is single or two-story.

Planning Permission for an Extension

In some instances, you do not need planning permission. Fortunately, your building contractor can advise you on this. Remember that an extension ought to be built with the same material to an existing dwelling.