Rear extension ideas for semi detached houses/
If you’re looking for extension ideas for semi detached houses you’ve come to the right place. The potential to extend with a semi-detached house is almost endless. With only one adjoining wall, you’ve got the possibility to add a side extension, rear extensions, loft conversions or even wrap around extensions or garage conversions.
And the choices you make around your extension can add some serious square meterage to your property, open up new social spaces, create multiple new rooms or even just let some extra light into an expanded room.
But of course, you have to work within the parameters of what is allowed under permitted developments or planning permission and the space you’ve got with your existing dwelling. So, we’ve gathered a whole range of extension ideas for semi detached houses to inspire the direction, style, shape and use of your extension project.
1. Extend as far back as possible
If you’re lucky enough to have ample space at the rear of your dwelling, then extending to the back can create so much more, it could almost double your floor space.
We love how this extension has been done very tastefully so it blends in seamlessly with the existing dwelling and you can barely notice it.
This extension looks to have created at least two more substantial rooms which is quite impressive!
2. Coordinate your extension
If there’s one sure-fire way to make a rear extension blend seamlessly with your original property, it’s by coordinating your roof and render.
The benefits of a coordinated extension are both practical and aesthetic and we’re wondering why this isn’t done more often.
It might mean taking on a larger renovation job but it’ll be totally worth it for the finished look.
3. Try a small sloping extension
When it comes to extensions, we’ve always got to work within the boundaries of the dwelling and land we’ve got. And sometimes budget or requirements means just a small extension will suffice.
We love how this home has extended their square footage amply but just extending backwards a couple of metres and coordinating the brickwork and roofing styles to the existing structure to create a small but significant addition.
4. Let the light into your extension
This structure is simply fantastic.
We love how the homeowners have used the normal roof structure to recreate the feeling of being in a lofty open space and the heavy use of Velux windows works so well to let all that natural light in.
Putting the kitchen in the big space also makes a really nice change as it makes the whole space a hub in the home and opens up such a social opportunity for interaction.
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5. Make your extension a garden room
This kind of structure remind us of all the light and openness of a greenhouse but still has the secure structure of a home extension.
We love how this kind of extension really embraces building into the garden and welcomes in the best of the outdoor elements also it makes for such a great lifestyle change in the home.
The hidden bonus of this extension idea, other than opening up a semi-detached house, is that it tends to cost less than a bricks and mortar construction so can be more budget-friendly.
6. Go full width with your extension
If your perimeters allow then choosing to build a full-width with your extension can create a huge amount of new floor space and doesn’t detract from the garden if you’ve got one big enough.
Taking up the full space you’ve got can double your ground floor square footage with a semi of this size and also makes for a nice contrast between architectural styles.
As a bonus, attaching a porch to the rear of your extension means you’ve got a great summer social space and expands your home even further.
7. Change up your roof shapes
If you’re going for a large scale rear extension across the width of your property then changing up architectural styles across pitched and flat roofing makes a profound effect visually.
This kind of extension design also means you can separate into two or more rooms and we love how this home has left the eaves of the pitched roof as a window to let extra light in.
8. Try a rear extension in two parts
Rear extensions don’t need to be limited to just a single room.
Depending on the rear of your property, you can get so much more out of your extension by opting for two parts to your plan, working both a strip at the rear but also a larger room out to the side.
This looks amazing with a semi particularly because it looks like it simply blends in with the rest of the house.
9. Extend with a simple flat roof
Sometimes a simple, flat roofed, single-room extension is all you need to transform inside your home.
These homeowners have made sure they avoid the common mistakes of this kind of room being dark by using big bifolds to make sure the light keeps streaming in.
We also love how they’ve coordinated with the existing dwelling to tie the whole thing together visually.
10. Go long at the back
So many semi-detached houses have nice, lengthy gardens which make for a huge opportunity to build into.
This home has decided to go long-ways with a big L-shaped extension and created a huge amount of new space.
If you click through to the original post, they’ve totally transformed a small, old house and extended it into something so much bigger and it all blends in perfectly.
11. Jazz up your exterior with render
Sure, we love the typical old red brick in a 1930s semi, but it can look absolutely smashing going with contrast for your rear extension.
The home pictured here has built a huge extension, spanning over two floors and really quite wide.
With something this big, you can mix it up the exterior finishes and create something new whilst it still looks at home with the original structure.
12. Go wide and wrap around
With a semi, you’ve usually got a bit of space to work with at the side.
These homeowners have built out to the rear and wrapped around to the side so they’ve maximised the extra added floor space and still made it look stunning.
We also really like how they’ve used a hefty rear patio to work between the different ground heights to the back of the house.
13. Use your extension to open out into the garden
When you’re building your own 1930s semi rear extension, you’ve got the perfect opportunity to incorporate larger, more expansive doors which can transform how you use your garden/
The home pictured here has fitted a deck which stretches back into the garden so they’re really extending the living and entertaining space, especially for the warmer months.
Bifolds really can work wonders in a rear extension!
14. Timber cladding looks amazing
Brickwork? No. Render? No.
Go with some spectacular-looking timber cladding to make your rear extension quite distinctive.
This idea works really well with flat roof extensions and creates a nice contrast between the 1930s look of the main home and something contemporary in the extension.
15. Work with colour!
If you’re trying to figure out a way to tie your extension to your existing home but don’t want to re-tile the entire roof, consider working colour across the two.
The home pictured here has used this stunning shade of green to tie a long rear extension to the rest of their 1930s semi and popped a black timber section around the two, too.
This way, you don’t need to re-finish both buildings just to make them coordinate and it looks great!
Are you on your own semi-detached house renovation journey? Have you extended? What kind of structure did you go for? Or do you have big plans for your renovation? Let’s get chatting!
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