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Famous for its Victorian homes, West Hampstead is a niche neighbourhood that keeps you well-connected with the rest of London. So, why move? No reason at all, except maybe you are running out of space in your home and want to upsize. The easiest answer is to make use of your generous Victorian loft space. Loft conversions West Hampstead by Good Design & Build expand the usable floor area and improve the value of your home at the same time. Still not sure how to? We are specialist Victorian and 1930s home remodellers. And, for every space available in your roof, we create a bespoke design that we build using high-level craftsmanship.

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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Loft conversions are the most beneficial space-creation technique for a period home. They make use of redundant or underutilised loft spaces unique to Victorian and 1930s homes and turn them into functional living areas. A loft conversion in West Hampstead is an effective way to increase the square footage of your home and its value, especially when upsizing is an expensive option. A professionally designed, high-quality construction increases the resale value of your property. Depending on the type of loft conversion you choose or feasible, you can add an extra bedroom, master bedroom, en suite, bathroom, playroom, or home office.

Velux Conversion or Rooflight Conversion – simple but effective, it involves converting your already available loft space into a livable room with the addition of roof windows (usually Velux windows). The windows get added to the existing roof slope without structural changes to the roofline. The room receives natural illumination from these windows, and opening them can ventilate it. These are perfect when your loft has sufficient head height and if your budget doesn’t stretch as far as the other types of loft conversions. 

Dormer Conversion – a dormer conversion extends the existing roof vertically, creating additional floor space and headroom within the loft. Dormers typically have a flat, hipped, or pitched roof and can feature windows, providing more usable space. 

Mansard Conversion – it is one of the most spacious conversion types available. Typically built at the rear, the entire roof plane gets altered to an almost vertical side, at least 72 degrees. The roof is flat with a slight slope, and windows get housed within small dormers. 

Hip-to-Gable Conversion – ideal for end-of-terrace and detached homes, a hip-to-gable loft conversion extends the existing ridge of a hipped roof. It straightens a sloping side to create a vertical wall by changing the hip of the roof into a gable. The extended roofline affords additional interior space. 

L-shaped Dormer Conversion – constructed with two flat roof dormers joined together at a right angle, it has a distinctive L-shape from a bird’s eye view. One dormer sits on the main roof and the other on the rear roof, often the outrigger in Victorian properties.

A loft conversion is a valued home improvement with a high ROI. The cost usually depends on the type of loft conversion you choose. While Rooflight conversions are the least expensive, more substantial conversions with additional features can cost more. The basic fees of transformation based on the type and square feet are as follows;

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

The success of your loft conversion project depends on getting several factors right. A practical, space-saving design that can seamlessly blend into existing architecture while enhancing the appearance of your home is one to start with. Loft conversion companies with in-house architects can help you conceive creative designs and draw them up with technical specifications that comply with planning permission. You must never carry out a DIY plan or design without a detailed understanding of lawful building and limitations of permitted development rights. 

Professional builders and structural engineers also know the latest building regulations that make your new space safe and legal. Hiring professionals take a load of logistical worries off your shoulders and ensure the new addition to your home is lawful, sound, and functional. There are many solutions when creating space, and you may not be aware of them all. So, get a reliable team on board, and you can make sure nothing goes amiss or awry.

We know the value a loft conversion can add to your property price, and we make it optimal. As specialists in Victorian and 1930s home conversions in London, we know how important it is to make every inch of floor space matter. Our projects have two stages, design, and build. Innovative designs that boost aesthetics and functionality make our loft conversions stand out from ordinary home improvements. Our architects with years of expertise in home remodelling deliver plans that encompass your needs, lifestyle, and maximum space utilisation. 3D rendering of our designs, which we create using the latest technology, gives you a ‘lived experience’ to familiarise yourself with the new space.

The design stage falls under a separate contract. There are no long-haul contracts you need to commit to. We undertake all pre-build requirements, including submitting planning permission and building control applications, preparing method statements, and assisting with Third Party Wall Agreements. Our skilled build team uses modern construction methods, quality materials, and sound engineering to build spaces to the highest standards. From planning completion, you get project management.

Our projects are design-centred. Our services cover designing, planning, and building. At completion, our products, fixtures, and fittings come with a warranty. We also undertake planning permission and building control applications submission and preparing method statements. A structural engineer will oversee the party wall agreement and technical specifications for Thames Water build over agreement. We work closely with local authorities and third-party suppliers to ensure your project runs smoothly from start to completion.

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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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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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