Bespoke Design & Planning

Over 12 Years of Experience

Free Consultation & Itemised Quotes

Full Cost Transparency & Project Management

Insurance Backed Warranty

As the backdrop for The Good Life, this gem of a town offers a relaxed lifestyle in a village atmosphere, accompanied by great schools and a fast commute. Fortunately with loft conversions in Surbiton, you can settle here for good, perishing the thought of ever having to move. Discovering space hidden in your attic for another room or two is an exciting and economical prospect. Made possible by specialist knowledge, passion for design, and high-quality building, we give your home the Good Design & Build treatment that propels your home value.

Loft conversions offer practical solutions for creating extra space without extending the property footprint, which can be particularly useful in urban areas where space is limited. It makes the loft space habitable, often with structural modifications to the roof. These include roof extensions, skylights, windows, insulation, staircases, and other amenities like electricity, plumbing, and heating. Attic conversions increase the floor space in your home for an extra bedroom or bathroom, or even a home office, workout room, art studio and more.

Roof Light (Velux) Loft Conversion – A cost-effective and uncomplicated design that doesn’t alter the roof structure. Instead, they incorporate roof windows, typically Velux windows, into the existing roof slope to introduce natural light and ventilation. These conversions are particularly suitable for lofts that already have sufficient head height.

Dormer Loft Conversion – Extending vertically from the existing roof slope, they provide additional floor space and headroom. Typically featuring flat roofs and dormer windows, they notably take the shape of a box but can also have pitched and hipped roofs for design variation. 

Mansard Loft Conversion – Carrying significant modifications to the roof structure, they create substantial living areas. Borrowing from the French Baroque style, they feature a central flat roof with an almost vertical wall that slopes at 72 degrees. 

L-shaped Loft Conversion – integrate two dormers positioned at right angles. The dormers constructed on the main and rear roofs appear like an L. These optimise space in Victorian properties with rear outriggers and can create two rooms, ideal for an en suite. A half-rear dormer offers the potential for balcony space.

Hip-to-Gable Loft Conversion – Well-suited for properties with hipped roofs, this method involves replacing the sloping ends (hips) with vertical walls (gables) to increase the head height. This approach generates more usable space within the loft, hindered by the hip ends of the roof.

Your Surbiton loft conversion cost depends on the design and size. Different types of loft conversion require varying degrees of building work. We offer a free site inspection and itemised quote, backed by cost transparency to help you decide the best conversion method for your home and requirements within your budget.  

Room in the roof conversion (basic) –  £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

Loft conversions in Surbiton offer a convenient solution for upsizing your home for your growing family and needs. They also improve your home’s energy efficiency with a well-insulated loft. Sometimes, an additional bedroom or bathroom can make a world of difference, from enhancing the comfort of your home life to improving the property value. 

However, it all depends on the quality of the addition. Your loft conversion must comply with current building regulations and planning permission. Failing to do so will cause numerous problems, from demolitions to prosecutions. Getting the help of a reliable and reputable loft conversion company is essential to your project’s success. 

Bespoke designs play a big role in tailored solutions for your unique requirements and your home’s available space. Architect-drawn design can accomplish higher aesthetics, increased functionality, and space-maximisation. DIY projects can often devalue your property. Choose professional expertise to get your money’s worth and your attic’s potential.

Home remodellers for London’s Victorian and 1930s homes, our bespoke loft conversions in Surbiton and surrounding areas are acutely design-focused. Our in-house architects draw tailored plans, individual to your property and requirements. We design naturally illuminated, functional, and versatile living spaces that exude contemporary elegance. Additionally, we generate 3D models of the designs to ensure accurate and practical visualisation.

Our process involves two separate phases: design and build, each covered by individual contracts. This flexibility enables you to explore creative options without committing to the build stage, although our clients typically see their projects through to completion. 

Our loft conversion team possesses in-depth knowledge of building regulations and planning permission requirements. We submit relevant applications for planning permission and building control. Our structural engineers assist with Party Wall Agreements, Thames Water build-over Agreements, and method statements.

We uphold high standards in our craftsmanship, from material selection to meeting completion dates. Each GDB project gets a project manager to oversee building work, maintain quality control and coordinate with third-party suppliers. Our commitment to accountability, flexibility, and reliability remains steadfast from conception to completion.

The cost of loft conversions depends on the floor area getting converted and the specific design elements they incorporate. Greater structural alterations that are more extensive and intricate require more resources. Additionally, the choice of materials for construction and finishing touches can also have an impact on the overall cost.

Our full-service loft conversion solutions include everything from detailed cost estimates to warranties. Structured in two distinct phases – a design phase and a build phase, we offer separate contracts for each stage. Our professional architects create custom designs that seamlessly integrate new living spaces into your home, enhancing both functionality and aesthetics.

We complete all pre-build requirements, including obtaining planning permissions, facilitating Third Party Wall Agreements, preparing method statements, and submitting building control applications. Our skilled construction team employs high-quality materials and modern construction techniques to bring these designs to life. 

Throughout the process, a dependable project manager supervises the project from its inception to completion, ensuring that any issues are addressed promptly and accommodating last-minute changes to achieve a flawless result.

The majority of loft conversions fall within permitted development rights. Nevertheless, specific designs and types of loft conversions may need planning permission. Factors that restrict PD rights include your property’s location, grade, and the scale and characteristics of the proposed conversion. We can assist you with planning permission when required.

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.

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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.

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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.

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