Loft finder
Answer a few quick questions. We'll show you the options that usually work for houses like yours in S Brentford.
The types of Loft Conversions that we work in - s Brentford
Brentford has come a long way in recent years and the people who put down roots here early know exactly what their homes are worth. A dormer loft conversion is one of the smartest moves you can make when you need more space but have no interest in leaving the area. It extends out from the back of your roof, fixes the headroom problem and turns a loft that nobody was using into a room that earns its place in the house every day. Brentford has a great mix of Victorian terraces, Edwardian semis and more modern homes and dormers work well across all of them. Get it right and it looks like it was always supposed to be there. Best for: Victorian and Edwardian homes in Brentford, families who need a proper extra bedroom or a quiet space to work from, and lofts that are currently too low or too cramped to be of any use.
If your Brentford home has a hipped roof you already know the loft feels awkward. The sides slope inward and that takes away usable space before you have even started thinking about a conversion. A hip to gable conversion addresses this head on. The sloping side is taken down and replaced with a straight vertical wall. The full width of the loft opens up and the whole space becomes far more workable. Combine that with a rear dormer and you have a layout with room for a bedroom and a bathroom without anything feeling tight. It is a clean and logical solution to a very common issue with Brentford housing stock. Best for: End-of-terrace and semi-detached homes in Brentford where a hipped roof is limiting what the loft can realistically deliver.
A Velux conversion is quiet, unfussy and often exactly what is needed. The roof structure is not touched at all. Roof windows are fitted carefully into the existing roof, the floor is reinforced, insulation is properly upgraded and the space is brought fully in line with building regulations. No extensions and no major structural changes are involved. For Brentford homes where the loft already has a decent amount of height this is frequently the most sensible approach. Less disruption, a shorter build period and a finished room that feels light and comfortable to spend time in. Sometimes keeping things simple is the best decision you can make. Best for: Brentford homes with good existing loft height, homeowners working to a set budget, and properties where the exterior of the roof needs to stay as it is.
Does your Brentford home have a rear extension? Then an L-shaped dormer could give you far more than you might be expecting. Two dormers are built together, one across the main roof and one sitting above the rear extension, and they connect into a single L shape. The floor area that creates is genuinely impressive and it completely changes what is possible in the loft. Two bedrooms and a bathroom? Easily achievable. A spacious master bedroom with an en suite and room for a wardrobe? That works perfectly too. It is one of those conversions where people stand in the finished space and struggle to believe it is the same house they walked into a few months earlier. Best for: Brentford properties with an existing rear extension, households that need more than one room from the conversion, and anyone who wants to get every last bit of potential out of their loft.
A mansard conversion is the biggest commitment on this list and it delivers the biggest results. The rear roof slope is completely rebuilt at a steep angle and finished with a flat roof on top. Inside you end up with a full height loft that does not feel remotely like an attic. It feels like a proper floor of the house with real ceiling height and genuine room to move. Brentford is a location where property values have risen consistently and a well-built mansard conversion is an investment that holds its ground. Full planning permission is required and the build is more involved than other types. That is worth knowing clearly from the start. But for homeowners who want the best possible outcome and are ready to commit to it properly a mansard conversion is the top of the range. Best for: Larger Brentford properties, homeowners who want to maximise floor area above all other considerations, and projects where a full roof transformation is both the right structural decision and a sound financial one.
Brentford has its share of bungalows and their lofts are regularly underestimated. The roof on a bungalow typically spans the full width of the property which means there is usually more usable space up there than it looks like from the outside. Converting it adds a proper upstairs to the home, bedrooms, a bathroom, whatever the household genuinely needs, while the ground floor stays completely unchanged. It is the kind of project that changes how a home feels from the inside out. Something that seemed to have run out of room ends up with an entire new floor to live on. That is not a small thing and most people who go through with it wonder why they waited as long as they did. Best for: Single-storey homes in Brentford where the ground floor is already fully occupied, and homeowners looking for a grounded and practical way to add lasting space without building outward or touching the garden.
Do you have a question about Loft Conversions? We're here to help. Contact our team at Loft Conversions London
Not necessarily. Some house loft conversions can fall under permitted development, provided all relevant conditions are met. The exact property and design need to be checked.
A dormer may be possible depending on the property, roof design and planning position. Conservation-area requirements can also affect the design.
Yes, parts of Brentford fall within conservation areas, including St Paul's Brentford. The exact address should be checked because conservation-area boundaries do not cover every property.
Flats and maisonettes have different planning rules from houses and generally do not benefit from the same permitted development rights for loft conversions. Lease and structural matters should also be checked.
It can be suitable for certain hipped roofs, particularly where changing the roof profile would create useful additional space. A property-specific assessment is required.
As a broad 2026 guide, many projects may fall around £40,000–£75,000+, while complex designs and high-specification conversions can cost more.
Yes. Building Regulations are separate from planning permission and are normally required when a loft is converted into habitable accommodation.
Yes, where the floor plan and drainage arrangements allow it. Plumbing, ventilation, water supply and structural requirements should be considered during the design stage.
Where a proposed conversion complies with permitted development rights, a Lawful Development Certificate can provide formal evidence that planning permission is not required.
