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Home Extensions

Don't move out, expand out

  If you need more space, but don’t want to move. Enter the house extension, modern Britain’s answer to all your cramped home woes. But not all home extensions are created equal. Did you know that there are 5 different main styles of extension to choose from? We can give you an overview of each type, what they are, what they’re good for and the all-important bit, a free quote!

There are five main types of extensions:

  1. Side Return

  2. Rear

  3. Wrap-around

  4. Double-Storey

  5. Dormer

A side return extension uses the dead space down the side of a property, whereas a rear extension extends into the back garden space.  A wrap-around extension does both and the double story does all three of the above.  Finally, the dormer or Loft Conversion is moving up into the attic space.   


Premier is a specialist loft and home extension builder, trusted and reliable, having improved hundreds of homes across Sussex and Surrey over the last 30 years.

side return extension

Rear extensions


As the name implies, a rear extension is placed at the back of your property, extending onto the current garden or patio area. They’re typically used to create larger open-plan living spaces and blend the indoor/outdoor space. A small one can usually be done without planning permission which saves some time and hassle. Smaller rear extensions typically take 3-4 months but if you’re looking for something really big then allow six months. Price wise you’re looking at £40,000 minimum for a 5 x 5 m extension but these costs rise depending on the quality of materials you choose and where you’re living. Unsurprisingly, the same extension in London will cost more like £67,000.


Side return extensions

Have you got an alleyway or path down the side of your house? Many period properties do and they’re typically home to bins and garden bits and bobs, adding little value to the overall living experience. For this reason, side return extensions are very popular as a way of extending your home. The extension itself is typically quite small in terms of how far out it comes but runs the length of the room, so it can have a transformative effect on your interior without the need for planning permission. Lost windows in the wall can be replaced with roof lights above, which will actually let in much more daylight than a window facing onto a fence or wall. You can expect to pay around £25k-35k and expect it to take 3-4 months to complete.

Wrap-around extensions

Wrap-around extensions combine a side return and rear extension, moving the outer walls in two directions. They’re great for extending your living space dramatically and really suit family living, creating huge open plan spaces where you can get a decent-sized kitchen, dining area and seating space in the same “room”. With so much extra space, you can also do a more thorough job of blending indoors and outdoors, using bifold doors and roof lights to create a blend and flow between garden and home. Costs for these extensions vary quite a bit as the size of the total extension can be quite different. For a ballpark, they’d typically start at around £55k and could take 4-6 months to complete.

Double storey extensions

Double-storey extensions mean that you’d take one of the three shapes described above, rear, side return or wrap around and extend over two floors as opposed to one. The advantage of this is that you get double the space but not double the cost. Typically a double-storey extension only costs 50% more than a single-storey one. This is because all the costs of foundations etc. are tied into the lower floor and creating an additional floor above is less work overall. Most double-storey extensions will need planning permission, so that’s something to consider when planning your home project.

Dormer extensions (Loft conversion)


What’s in your attic? Old suitcases? chest of drawers? If so, then a dormer extension may be a great option. A dormer extension removes the pitch of the roof and creates a flat roof in line with the top of the current pitch, so you get a squared-off box space that is ideal for creating things like master bedrooms with ensuite bathrooms, or additional space for kid's bedrooms. They rarely need planning permission and are very affordable compared with a lot of extension work, starting at £32,000. They’d typically take 3-4 months to complete, so it’s worth bearing in mind that if you currently sleep in the room to be extended you’ll need somewhere else to hit the snooze button whilst this happens.

We are here to help you get started, create a design and give you a quote.  Let us know, we’ll be happy to help. Our works are all project-managed and only use qualified professionals and trades that we trust to get the job done right.

Dedicated & professional service team

Quite a few of our customers come to us having spent many years and a significant amount of money creating their dream home, only to find themselves suddenly outgrowing it.  Converting a loft can be a great way to add value to a property but also transform it so that it can meet the needs of a growing family.


Our friendly and dedicated team can help guide you to the right loft conversion one that will meet your needs and help you through the process.

Add much-needed space and increase value to your property

Locations we cover: Premier is able to covers most of the south coast. We undertake home extensions in: Brighton Worthing Haywards Heath Horsham Bognor Regis Arundel Littlehampton Hove Shoreham Crawley Havant Chichester

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