House Extensions

Our design and build house extensions are designed to provide you with everything you need from an additional space for your property. A one stop shop, if you will.

We will ensure everything is taken care of, from plans and design right through to completion, leaving you with a bespoke house extension that is built to the highest quality and adheres to all local building rules and regulations.

Our team will plan, design and build your new home extension to your exact requirements. We will be on hand to offer our expertise throughout the project, will keep you updated during its progress and will do all that we can to make sure the entire building process is as stress-free as possible for you.

Most properties can be extended, though it does depend on the amount of available space. Factors need to be considered, such as the available space in the garden or along the side of the property, the area, the council regulations and other things like this. One of the biggest factors is the space you have available outside the property as there are different regulations with regards to building a home extension.

Our site surveyor will be able to tell you during initial discussions the options that are available to you and what sort of extension projects you can consider.

Because each house extension project is bespoke and different from the next, it's difficult to provide a ball park figure for each project. The size, specifications, materials and obstacles are just a few things we need to consider.

Fortunately, we do offer a free no obligation quotation where we will visit the property and discuss things in detail so that we can work out an accurate cost for you.

We offer a wide range of house extensions tailored to your property type and available space. During our initial discussions, we'll outline the advantages and disadvantages of each option. Popular extensions include single-storey side or rear extensions, double or multiple-storey extensions, garage or kitchen extensions, and outbuildings like conservatories, porches, and orangeries. Extensions can also complement conversion projects, such as adding to a new or existing garage or basement conversion.

In most cases the building of a house extension requires no planning permission because they come under permitted development rules. This means there are no issues with building your extension provided local building rules and regulations are followed.

This doesn't mean that you can simply build whatever you like, as plans still need to be submitted, structural calculations need to be made and you will still need approval from local building control.

If your property is a listed building, located in a conservation area or in an area where permitted development is not allowed then you must receive planning permission from your council before undergoing a home extension project.

If you have a party wall connecting your property, then you will need inform your neighbours about the home extension plans you're choosing to undergo. You don't need permission from them as such, but you do need to tell them. If they have a problem with the proposed extension plans then you'll need to get a party wall surveyor involved.

If it came to this, the party wall surveyor would then issue party wall notices on your behalf as well as scheduling a time to inspect the connecting wall. They will take photographs and produce a party wall award that will outline the works that can be carried out. This is a very straight forward process and should not be confused with planning permission, as there is no room for refusal in this.

We carry out home extensions in all shapes and sizes, and for a wide range of purposes right across Cardiff as well as the surrounding areas of South Wales.

Yes, RGB Construction are members of the Federation of Master Builders (FMB).

Yes, as with all our completed building projects, your house extension will come complete with a guarantee.