Semi-Detached Loft Conversions in London

At SimplyEasy Refurbs, we specialise in designing and building loft conversions for semi-detached homes in London. Semi-detached homes have excellent potential for loft conversions, as the existing roof includes a hipped side that can be extended or reconfigured. By making better use of the roof space, you can create an additional new floor without changing the property’s footprint.

Depending on the shape of the roof and the amount of existing headroom, a semi-detached house may be suitable for a hip-to-gable conversion, rear dormer, Velux conversion or a combination of several styles. The right design can create anything from an additional bedroom and ensuite to a larger master suite, home office or multiple new rooms.

With careful planning, the finished loft should feel like a natural continuation of the existing home rather than an added-on space.

Advantages

  • Makes use of otherwise underused roof space.
  • Hip-to-gable designs can significantly increase the width of the loft.
  • Can create space for bedrooms, bathrooms, offices or larger master suites.
  • Rear and side roof areas can provide good opportunities for natural light.
  • Different conversion styles can be combined to maximise the available space.

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House Extension Types

There are several types of semi-detached loft conversions, each offering different looks and levels of space. Here are a few common options:

Semi-Detached Hip-to-Gable

A hip-to-gable conversion replaces the sloping side of a hipped roof with a vertical gable wall, creating significantly more width and usable internal space. It is one of the most popular loft conversion options for semi-detached homes with hipped roofs.

Hip-to-Gable with Rear Dormer

Combining a hip-to-gable conversion with a rear dormer can maximise both the width and depth of the new loft. This configuration can provide enough space for a large master bedroom, ensuite, dressing area or multiple rooms.

Rear Dormer Loft Conversion

Also known as a gabled dormer, this type has a pointed roof that matches the existing roofline of the house. Gable dormers tend to have more visual appeal and can add a traditional look to your home.

Velux Loft Conversion

A Velux conversion retains the existing roof shape and introduces rooflights to bring natural light into the loft. This can work particularly well where the roof already has sufficient headroom and only limited structural alteration is required.

L-Shaped Loft Conversion

Where the property includes a rear outrigger, an L-shaped conversion can extend across both the main roof and rear section of the home. This can create a significantly larger loft footprint and allow for more flexible room layouts.

Our initial visit and quotes are free, so if you have a space you’d like to see transformed, simply contact us.

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Trusted by homeowners across the UK

Lindsey Woodward profile picture
Lindsey Woodward
2 months ago
Fantastic attic conversion with SimplyEasy. Our project manager Ben was amazing throughout the whole process. We were kept informed on every detail at every stage. The work was carried out really fast and finished on time. Highly recommend for any work you need on your home!!!
Logan Max profile picture
Logan Max
3 months ago
SimplyEasy Refurbs provided a fantastic bespoke design for our project – they really listened to what we wanted, came up with clever, space‑saving ideas, and delivered a finished result that feels perfectly tailored to our home
Kevin Lieng profile picture
Kevin Lieng
4 months ago
We recently had our loft converted and are absolutely delighted with the result. From the very first meeting with Seb, who took the time to explain all the options and answer our questions, we felt confident we had chosen the right company. He was knowledgeable, professional, and never made us feel pressured at any stage.
Throughout the project, Marius was our project manager. He kept everything running smoothly, communicated clearly, and ensured the work was completed to a very high standard. Marius’s team was very good, hardworking, and clearly took pride in their work, which really showed in the final finish.
The workmanship throughout was outstanding, and the finished loft has completely transformed our home. The attention to detail, quality of finish, and professionalism shown throughout the project exceeded our expectations.
A big thank you to Seb, Marius, and the entire team for delivering such a fantastic loft conversion. We would highly recommend this company to anyone looking to add valuable space and improve their home
Robert Baylay-Bell profile picture
Robert Baylay-Bell
5 months ago
I initially came across Simply Easy Refurbs (SER) online and followed their work for some time before my project reached the right stage. When I was ready to proceed, they were one of three companies I invited to quote.

From the outset, SER stood out for their efficiency, professionalism and clear understanding of the brief. As part of my due diligence, I spoke with three of their previous clients, all of whom gave strong, consistent feedback. This gave me the confidence to appoint them for a full refurbishment, including a loft conversion and rear extension.

Throughout the project, SER maintained a high standard of professionalism. Communication was consistent, with regular check-ins to ensure everything remained on track and aligned with expectations.

I would not hesitate to recommend Simply Easy Refurbs to anyone considering a full home refurbishment.
Katrina Gimbrere profile picture
Katrina Gimbrere
6 months ago
We used Simple Easy Refurbs to do our loft conversion and are very happy with the service. They used highly skilled builders and helped us resolve any issues that did crop up. They communicated well and I would recommend them to anyone looking to convert their loft.
Vanessa Pinnock profile picture
Vanessa Pinnock
7 months ago
Brilliant execution
We had a very good experience with Simply Easy Refurbs, the communication was always on point whether email, what's app or telephone. The dedicated what's app group is a great platform to check on the progress, share ideas visually etc. We had a good working relationship with all the team but especially with Tomas, our design was executed to a very high standard. All the works carried out was highly professional, done to a high standard and good quality materials were used. All the tradesmen involved worked exceptionally hard sometimes staying later than expected just to get the job done!
We're very happy with the end result. We have a future proof, modern design and the loft conversion has created so much space! We would highly recommend this firm for renovation projects! Thanks again to Seb, Tomas and the team.
Nick Hodgson profile picture
Nick Hodgson
1 year ago
We had a great experience with Sebastian and his team. Our mansard loft conversion has added a whole new floor to our flat and provided an amazing new bedroom for our daughter. Our builder Loren and his team were excellent - the work was done on time and to cost; any issues were swiftly dealt with. As expected, we had to get a fire sprinkler system installed - with hindsight we could have started shopping around for a company to do it before building control confirmed it would be necessary; but we were lucky - we found a company who could do it quickly and that meant there was no delay to our project. The aftercare has been fabulous - only today their electrician came back to move a fan in the new bathroom ceiling that was in the way of our new cupboard doors. We couldn’t have asked for more from SimplyEasy Refurbs: we’d recommend them 100%.
Valerie Bourdieu profile picture
Valerie Bourdieu
1 year ago
I had a very specific idea for my loft and the team made it happen. Great advice, great quality work. I had so many positive comments from friends and relatives. Also, I recently put my house on the market and viewers loved the loft, I have no doubt that the loft helped my house sell faster. Plus, you pay for what you signed for, no hidden fees, furthermore timing was again to what was agreed! I would have no hesitation to recommend SimplyEasy Refurbs!
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Recent Projects

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London Roof Mansard In Battersea

A recently completed mansard loft conversion in South London. This project created space for a two good sized rooms and a brand new bathroom.

London Roof Mansard In Lewisham

A recently completed mansard loft conversion in South London. This project unlocked space for a full bathroom, home office, and large primary bedroom with a built in wardrobe.

London Roof Mansard In Brixton

The homeowners behind this project keen to make the space in their home work harder for them, without going through the stresses of trying to sell and the logistics of moving.

L-Shaped Loft Conversion In Clapham

This bright L shaped loft conversion in Clapham is one we’re still thinking about. That orange wall contrasting with the blue built in wardrobe is so striking! This project unlocked space for a generously sized main bedroom, a bathroom, and a second additional multi use room.

Dormer Loft Conversion In Tooting

This newly completed dormer loft conversion in Tooting had the finishes kept deliberately neutral and minimal, to maximise the feeling of space and light. This project created space for a new bedroom and ensuite bathroom.

Dormer Loft Conversion In Norbury

This recently completed dormer loft conversion in Norbury created a wonderful amount of space for the homeowners. Not only were we able to design and build a new primary bedroom, but also a small office, walk in wardrobe with built in storage, and an ensuite bathroom. The Juliet balcony is a lovely touch too.

Dormer Loft Conversion In Wandsworth

This recently competed dormer loft conversion in Wandsworth was on an end terrace building. This project unlocked space for a new bedroom for the growing family, a bathroom, some built in storage, and a little nook to sit and rest.

View All Projects


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Semi-Detached Loft Conversions

Can you convert the loft in a semi-detached house?

Yes, many semi-detached homes are well suited to loft conversions. The options available will depend on the existing roof shape, headroom, structure and how the new staircase can be incorporated into the property.

What is the best loft conversion for a semi-detached house?

Hip-to-gable conversions are particularly common on semi-detached properties with hipped roofs because they can dramatically increase the usable width of the loft. They are often combined with a rear dormer to create even more internal space.

Do I need planning permission for a semi-detached loft conversion?

Many loft conversions can be completed under permitted development rights if they meet the relevant limits and conditions. Planning permission may still be required for larger alterations, properties in conservation areas or homes with existing restrictions.

How much does a semi-detached loft conversion cost in London?

The cost depends on the type and size of the conversion, structural requirements and chosen specification. A hip-to-gable conversion with a rear dormer will generally involve more work than a straightforward Velux conversion. Use our project calculator to calculate rough costs for your loft conversion.

How much extra space will this add?

The amount of new space depends on the size and shape of the existing roof. A well-designed hip-to-gable and dormer conversion can often provide enough room for a large bedroom and bathroom or multiple smaller rooms.

Can I have a hip-to-gable and dormer conversion together?

Yes. This is a popular combination for semi-detached houses because the hip-to-gable increases the width of the loft while the rear dormer increases usable floor space and headroom.

How long does this type of loft conversion take?

The construction period depends on the scale of the project and the amount of structural work involved. Simpler conversions may take several weeks, while larger hip-to-gable and dormer projects with bathrooms and higher-end finishes can take longer.

Enhance Your Semi-Detached Home with a Loft Conversion

To learn more about the benefits of loft conversions or to discuss your property in more detail, talk to our experienced SimplyEasy Refurbs team today.

We’re a member of the Federation of Master Builders, and offer free quotes and price matching on all projects.

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