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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.

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skylight illustration in loft conversion
loft conversion - illustrated window
dormer loft conversion
Hip to gable loft conversion with rear dormer

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.

loft extension
loft conversion and extension outwards
l shaped dormer loft conversion
loft extension -Terraced House

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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Loft Conversion Types - Faqs

What Are the Different Types of Loft Conversions?

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.

What Types of Loft Conversions Require Planning Permission?

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.

How Much Do Different Types of Loft Conversions Cost?

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

What Type of Loft Conversion Will Add the Most Value to My Property?

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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