Types Of Loft Conversions London

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Different Types of Loft Conversion

There are a range of different types of loft conversions. Depending on the type of property and existing loft configuration, different options are better suited to certain budgets. There are also certain types of conversion that are better suited to special requirements. It is also possible to choose a loft conversion that does not require any planning permission.

There are a few basic things to consider when thinking about a loft conversion. Minimum height requirements and staircase regulations are very important. Assuming the property has a suitable attic space and there is space for a staircase, then you can choose to maximise space with different structures. A Velux is a fairly straightforward loft conversion that works within the existing roof space. If you want to add additional space then a dormer conversion is a popular choice that works with many building types and can add considerable square footage to a small loft space.

You can find more information about all of the different types of loft conversion below. Clapham Construction is always happy to discuss your loft conversion and help you navigate the various considerations that go into a loft conversion. Talk to us for a free consultation and find out how to achieve your dream loft conversion.

Skylight Conversion

A Skylight or ‘Velux’ loft conversion is one of the simplest conversion types to build. As the roof of the property is not altered  it is normally possible to avoid planning permission. A great way to increase space at lower cost.

Two Window Dormer

Often found on existing homes built 100 years ago and sometimes requested by the planning officers. This conversion provides a surprising amount of additional head room and can be a stylish way to add a loft conversion.

Dormer Conversion

This is one of the most popular types of loft conversion. It provides a large amount of additional space up to 60 Cubic metres and really good head height. It also gives additional design potential such as Juliet Balcony, floor to ceiling glass and roof lights.

Hip to Gable & Rear Dormer

As the title states, the side sloping roof has been raised , normally in brick, and allowed us the head height and structure to add a rear dormer.

Hip to Gable

This is a simple conversion as shown in the image as all we have done is change the side sloping roof and raised this side in brick, which turns a low roof, with low head height into a workable space for any combination of conversion.

L – Shaped Mansard

As with the L-Shape Dormer, the L-Shape Mansard will add a larger amount of space with multiple design options by using the roof of the rear addition. Planning permission is required for this type of work, but we can submit approval for Juliet Balconies and a terrace to really make this conversion special.

L-Shape Dormer

This type of loft conversion is built by joining two dormer builds together, utilising the rear addition. This results in a significantly larger space than other builds. This conversion gives options for more bedrooms in the new build, a terrace on the rear addition and spare rooms, studies or bathrooms.

Mansard Conversion

A mansard loft conversion alters the structure of a sloping roof to an angle of 72 degrees, given a unique shape as shown. Windows are fitted into the new roof almost like small window dormers. Like Dormers the Mansard conversion is usually erected to the rear of a property , but can be constructed as a front and rear mansard (double mansard) if permitted. This conversion provides a larger amount of space, effectively adding another floor to your home.

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Andy Brown
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From the initial meeting to the final finishing touch, Paul, Dangis and their team were great! We knew exactly what to expect each week, we had lots of photos and drone videos of work happening when we couldn’t see. They were full of advice and suggestions when we couldn’t visualise the end result. They left our home as clean and as tidy as they possibly could (we were living in the house as they were working around us). We are really pleased with the end result and with the building experience! Great time, fantastic work ethic and brilliant result!
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Rebecca Barrett
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We can’t thank Paul, Dangis, and the team, enough for their hard work on our house. The house is everything we had imagined and more. We increased our scope multiple times throughout the process, and the team helped us seamlessly, and were always there to answer questions and support our plans. We only have good things to say about Clapham Construction, and will definitely be recommending them to all our friends and family. Thanks again!
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Helen Stevens
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I cannot speak highly enough of Clapham Construction. Paul and Dangis were a dream to work with from start to finish. Everything was communicated so well and they provided honest, transparent and clear advice throughout; I felt supported and guided through all the decisions and they helped me make more bespoke decisions such as our windows and floor which weren’t necessarily easy! Everyone who came to work on the loft was excellent and it has all been completed to a high standard. The loft is beautiful and we just can’t believe how much space we have and how well done everything is. I would (and have!) recommend to anyone! Thank you Paul and Dangis - and we will be coming straight back to you for the next project!
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Georgia Beales
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We’ve had our dormer loft conversion for coming up to three years now and haven’t had any major issues in this time. Any minor snagging issues have been dealt with quickly by Clapham. The whole process from start to finish was seamless. All the builders were very friendly and considerate too. Will continue to recommend this company to anyone who needs a loft done and will not hesitate to use again in the future. Thank you!
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Danilo Rico
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Clapham construction service was extremely professional, the project was finished before the plan and we are so happy with our new space. Problems were resolved quickly and efficiently throughout the process. This was one of our best investment that not only added value to our property but also a significant improve of our quality of life.
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Joel Prime
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I had a loft conversion completed by Clapham Construction Service earlier this year and couldn't be happier with the results. Paul and Dangis were on site every day and kept me fully informed throughout the entire process. Their communication, professionalism, and attention to detail were outstanding. I felt completely confident in their work from start to finish. Highly recommended for anyone looking for reliable and high-quality building services.
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Jane Ansell
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We recently completed a double mansard loft conversion with Clapham Construction Service, and were very happy with the whole design and build process from start to finish. Paul and Dangis were great to work with, providing clear communication and always being available to answer questions or discuss options. Their team are also excellent, with all the trades doing a great job, very professional and respectful of the rest of our house. Inevitably with a build project there were a couple of issues that cropped up along the way, but CCS were excellent at helping resolve them. We are delighted with the final loft and the extra space, and have already recommended them to others!
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Jamie Garratt
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We have just completed a loft conversion with Clapham Construction and it was great! We are so pleased with the new loft we have in our house, but the process of working with CC was really good. They were easy to engage with from the outset, the price was competitive and the actual construction was quick and efficient. Obviously it was a major building project with all the mess and decisions you’d expect, but it was made a lot easier and less stressful working with Paul, Dangis and the team. They completed the project on time and on budget and we enjoyed working with them - that is more than almost anyone we know can say about similar projects! We’d definitely recommend them.
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Christina Ansong
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We had an exceptional experience with Clapham Construction for our loft conversion. Paul, Dangis, and the whole team were fantastic from start to finish. They transformed our attic into two beautiful loft rooms and a bathroom, exceeding our expectations with their attention to detail. The entire project was completed at an impressive speed without compromising quality. The team showed great care throughout, ensuring everything was done to the highest standard. Their service was professional, friendly, and stress-free. We’re absolutely thrilled with the results and would highly recommend Clapham Construction!
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Ayan Sengupta
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We have recently used Clapham Construction Services for loft conversion to add a bedroom and a bath in the house. We are very happy with the end-to-end experience with Paul, Dangis and the entire CCS team for high quality work done in quick time and with a very collaborative approach. Our overall project went into some unexpected blockers, but Paul and Dangis patiently helped us to resolve all the matters, kept us updated with timely communication and have been very flexible to guide us. They brought in a fantastic team to complete the work fast and in a cost-efficient manner. We will recommend CCS any day as a trusted team for home transformation projects.

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"I had a loft conversion completed by Clapham Construction Service earlier this year and couldn't be happier with the results. Paul and Dangis were on site every day and kept me fully informed throughout the entire process. Their communication, professionalism, and attention to detail were outstanding. I felt completely confident in their work from start to finish. Highly recommended for anyone looking for reliable and high-quality building services."

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Loft Conversion Types - Faqs

There are four main types of loft conversions:

  • Dormer Loft Conversion: This is the most common type, involving an extension that protrudes from the slope of the roof.
  • Hip-to-Gable Loft Conversion: This extends the side roof area of the house, converting the ‘hipped’ side of the roof to a flat ‘gable’.
  • Mansard Loft Conversion: This involves changing the entire roof structure, usually at the rear of the property, to create a much larger space.
  • Velux Loft Conversion: This is the simplest type, involving the installation of Velux windows into the existing roofline, without altering the roof structure.

Planning permission requirements can vary depending on the local council and specific circumstances, but here are some general guidelines for when planning permission may be required for different types of loft conversions in London:

Dormer Loft Conversion

  • Planning Permission Required: Usually not, unless the dormer is facing a highway or exceeds certain size limitations.

Hip-to-Gable Loft Conversion

  • Planning Permission Required: Generally not, but if your property is semi-detached or in a conservation area, you may need to apply.

Mansard Loft Conversion

  • Planning Permission Required: Almost always, as this involves significant structural changes to the roof.

Velux Loft Conversion

  • Planning Permission Required: Rarely, as long as the Velux windows do not protrude more than 150mm from the roof plane.

Additional Circumstances Requiring Planning Permission

  • If the property is listed or in a conservation area.
  • If the conversion increases the roof height or alters the shape significantly.
  • If you’re planning to include a balcony, veranda, or other raised platform.
  • If the converted space exceeds 50 cubic metres for detached and semi-detached houses, or 40 cubic metres for terraced houses.

ype of conversion, the location of your property, and the specific requirements of the project. Here are some general guidelines for the cost associated with different types of loft conversions:

Dormer Loft Conversion

  • Estimated Cost: Generally the most affordable option, but costs can still vary.

Hip-to-Gable Loft Conversion

  • Estimated Cost: Mid-range in terms of cost, but this can fluctuate depending on the complexity of the project.

Mansard Loft Conversion

  • Estimated Cost: Typically the most expensive due to the extensive structural changes required.

Velux Loft Conversion

  • Estimated Cost: Usually the least expensive as it involves fewer structural alterations, but costs can still vary.

It’s important to note that these are just rough estimates and the actual cost can differ significantly. Additional factors like the quality of materials, labour rates, and any required planning permissions can also impact the final cost

The value that a loft conversion adds to your property can depend on various factors such as the existing layout of your home, the local property market, and the quality of the conversion itself. However, here are some general insights into how different types of loft conversions can impact property value:

Dormer Loft Conversion

  • Value Addition: Good for adding both space and value, especially if it includes an extra bedroom and bathroom.

Hip-to-Gable Loft Conversion

  • Value Addition: Can add significant value if it transforms a cramped attic into a spacious, usable room, particularly in semi-detached or end-of-terrace homes.

Mansard Loft Conversion

  • Value Addition: Often adds the most value due to the substantial increase in living space, but also comes with higher costs.

Velux Loft Conversion

  • Value Addition: Adds the least value compared to other types, but still a good option if you’re looking for a budget-friendly way to gain extra space.

In London, where space is at a premium, any well-executed loft conversion can add considerable value to your property. Mansard conversions are often seen as the most lucrative, given the significant increase in usable space they offer. For tailored advice and to ensure you’re making the most informed decision, consider consulting with property experts like Clapham Construction, as they can provide valuable insights into what type of conversion will offer the best return on investment for your specific situation.

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