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Kingston is where the hallmarks of the good life come together. Superlative outdoors, retail amenities, good schools, and riverside leisure pursuits make anyone living here feel like they have it all. Don’t let a few missing square feet make you give it up. Loft Conversions Kingston can enhance and transform your attic space for bigger and better things. It’s true what they say – it’s not what you know but who you know. Meet our team and learn about how we give your home a new lease of life. 

Don't move. Extend in style

We can save you the hassle that comes with moving not to mention the heavy stamp duty! Adding an extra loft bedroom or enlarging the living kitchen dining space on ground floor is an economical way of transforming your home to suit growing needs. The projects can range from £40-100K depending on your requirements and can be completed within 8-16 weeks.

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Converting your loft involves turning your empty or underutilised loft space into a functional living area. While the most basic conversion doesn’t make structural changes, other types require structural changes to the roof to create more headroom and floor space. Loft conversions build upwards to increase usable floor area rather than extending the property footprint. They can create bedrooms, bathrooms, home offices, studios, playrooms, nurseries, and quiet retreats. 

A converted loft is properly insulated, which helps prevent heat loss for better energy efficiency of a home. The extra bedroom or bathroom you build in the loft can improve property value, provided the craftsmanship is professional.

Rooflight Conversions – also called Velux conversions due to Velux roof windows often used to bring natural light and ventilation into the loft to make it habitable, they are a relatively simple conversion type. They do not require changes to the existing roof structure. Due to minimal transformation, these require headroom sufficient for functional spaces. They are the least disruptive loft transformation for semi-detached homes. 

Dormer Loft Conversions – it involves extending a sloping roof upwards with walls to create additional living space within the loft area. Typically built at the rear or sides of the property, dormers can have a flat, single-pitched, or double-pitched roof. They offer more head height and floor space compared to Velux conversions. 

Mansard Loft Conversions – French by origin, mansards create the most substantial spaces. An entire roof plane gets converted, dramatically altering the angle of the roof slope, giving it a near-vertical lift. They have a 72° wall, a flattish roof, and gables on the two sides. You can create one large living space or multiple rooms. 

L-shaped Loft Conversions – They extend the existing attic space in two directions, creating an L-shaped layout. Two dormers join at a right angle, with the primary dormer sitting on the main roof and the other on the rear outrigger. Victorian properties are the main contenders for this type of loft conversion due to their outrigger feature.

Hip-to-Gable Loft Conversions – They replace the hipped end of a roof with a vertical wall, known as the gable end. The gable end is perpendicular to the existing roofline. Extending the roofline vertically effectively increases the internal space in the loft, providing more usable floor area and headroom.

The loft conversion cost depends on several factors, including the size of the conversation, the extent of the structural changes, and design features. Fewer alterations to the roof and simpler layouts are more economical. However, the benefits usually outweigh the cost. A loft conversion is cheaper and less disruptive than moving to a bigger home. Well-designed and built additions can also increase property value, which makes them an investment. Bespoke designs can save money and offer space solutions for your specific requirements. They can also complement the existing architecture by way of seamless integration. Here are some of our basic pricing for different types of loft conversion, but feel free to ask for a free quote. 

Room in the roof conversion – £35,000

Dormer loft extension – £50,000

Mansard extension – £60,000 – £65,000

Hip-to-gable extension – £65,000

L-shaped extension – £65,000 – £75,000

Your dream loft conversion project should not be a DIY affair. There’s more leeway for things going wrong without professional expertise. A loft conversion company has years of experience in designing and building new spaces. They know the pitfalls and snags and how to avoid them. Planning requires a specialist understanding of specifications, and bespoke plans require accurate calculations and measurements. They are well-versed in the latest building regulations and planning guidelines. Professionals also have established connections with suppliers to procure select materials and products for the best prices. And you cannot beat skilled craftsmanship when it comes to building.

We are Victorian and 1930s home loft conversion specialists with a design-focused approach. Our innovative space creation solutions are bespoke. We use the latest 3D technology to offer a practical sense of space you can experience with AR and VR. Creative flair and maximum functionality get incorporated into the plans our resident architects draw up. Our high-quality designs drive our success with transformative spaces that bring joy to our clients. 

Loft conversions in Kingston upon Thames by GDB are not just about adding extra rooms but creating spaces that enhance the value of a home. Visually stunning, versatile, well-lit, and free-flowing living areas built to high standards garner interest from potential buyers. With your project managed from start to finish by a dedicated foreman, you will not be spending time or effort worrying about your loft conversion project. Our team will be working closely with local planning authorities and third-party suppliers to ensure the necessary elements come together to complete the project successfully. There is no one big contract for you to sign. You only say yes to the build phase if you love the designs.

Your Kingston loft conversion may not need planning permission as most loft conversions come under permitted development. However, certain conversion types and features do require planning permission. If you live in a conservation area or a listed building, there are limitations to permitted development rights. Use our free consultation service to learn more about your options.

How we deliver projects

Our process is simple and divided into two distinct phases with separate contracts: Design and Build. As a client you only commit to one phase at a time depending on what stage of the process you are in. Each phase consists of three stages as described below.

1. Design

This is the kick-off point for your project. We carry out a complete architectural measured survey of the property. This allows us to create accurate CAD design drawings. This is followed by a design meeting to start discussing your ideas in more detail.

2. Planning

At this stage we finalise the designs with you and start preparing planning applications as needed. We place a high priority on ensuring that plans, designs and schedules are all based on a thorough and detailed understanding of planning guidelines. We co-ordinate with local authorities until the decision is made, and the planning approval is secured.

3. Technical

Once the planning consent is secured, we translate the design drawings into more detailed technical drawings for the purposes of building control and construction. This also includes specifications and structural calculations. At this stage, we will also submit to you our ‘no obligation’ quote for the build phase.

4. Pre-build

90% of our clients decide to stick with us after the design phase is completed. Once the build contract is signed, we kick off the process by making sure all the pre-build processes are complete. These include assistance with party wall agreements, Thames Water build over agreement, submitting building control application, and preparing method statements etc as needed. This stage ends with a pre-start meeting with your foreman before the actual build begins.

5. Build

One of our foremen will be dedicated to your project and will be on-site to manage everyday works. Our project managers will be overseeing the works to make sure they are completed to high standards, within your budget and on time. Throughout the process we will keep you updated with the progress and coordinate the works with third parties such as kitchen or flooring suppliers. We will also advise and guide you to choose any suppliers if needed.

6. Handover

As the build draws to finish, we will help to iron out any ‘snags’ to make sure everything is completed to your satisfaction. We will put together all necessary certificates such as gas, electricity and building control completion along with warranties for glazing, boiler etc. At the final completion meeting, we will hand you these documents, together with the keys to your house. Needless to say, you can contact us any time after this, if you want us to look at something.


This is the kick-off point for your project. We carry out a complete architectural measured survey of the property. This allows us to create accurate CAD design drawings. This is followed by a design meeting to start discussing your ideas in more detail.

At this stage we finalise the designs with you and start preparing planning applications as needed. We place a high priority on ensuring that plans, designs and schedules are all based on a thorough and detailed understanding of planning guidelines. We co-ordinate with local authorities until the decision is made, and the planning approval is secured.

Once the planning consent is secured, we translate the design drawings into more detailed technical drawings for the purposes of building control and construction. This also includes specifications and structural calculations. At this stage, we will also submit to you our ‘no obligation’ quote for the build phase.

90% of our clients decide to stick with us after the design phase is completed. Once the build contract is signed, we kick off the process by making sure all the pre-build processes are complete. These include assistance with party wall agreements, Thames Water build over agreement, submitting building control application, and preparing method statements etc as needed. This stage ends with a pre-start meeting with your foreman before the actual build begins.

One of our foremen will be dedicated to your project and will be on-site to manage everyday works. Our project managers will be overseeing the works to make sure they are completed to high standards, within your budget and on time. Throughout the process we will keep you updated with the progress and coordinate the works with third parties such as kitchen or flooring suppliers. We will also advise and guide you to choose any suppliers if needed.

As the build draws to finish, we will help to iron out any ‘snags’ to make sure everything is completed to your satisfaction. We will put together all necessary certificates such as gas, electricity and building control completion along with warranties for glazing, boiler etc. At the final completion meeting, we will hand you these documents, together with the keys to your house. Needless to say, you can contact us any time after this, if you want us to look at something.

What Our Clients Say

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Build a Quote!

Let's get started with building your own bespoke quote for your dream extension. Tell us as much in detail as possible to get most accurate price.

Get Started

Build a Quote!

Let's get started with building your own bespoke quote for your dream extension. Tell us as much in detail as possible to get most accurate price.

Get Started