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Creating beautiful living spaces with Victorian dormer loft conversion

It is exciting to discover your Victorian loft’s potential to expand your home floorspace. The endless possibilities and design ideas can take your average period home to new heights. A dormer loft conversion is a popular type of loft conversion in the UK that adds more floor space by extending an existing roof vertically. The structure will have walls built to a 90-degree angle and carry a pitched or flat roof. Their box-like shape makes the building and design process straightforward while affording plenty of head height and usable floor space. They are ideal for terraced properties as well.

One of the biggest advantages of a dormer is it falls under your permitted development rights. It means they do not require planning permission providing you adhere to building regulations.

You can add an extra room to your house with a single dormer or two separate rooms with a double dormer. Dormers can be at the back or the front. Rear dormers face the back garden and usually extend the whole length of the roof to maximise loft space. Side dormers, too, can extend the entire length of the existing roof, creating a larger space for a master bedroom with an en suite. Gabled roofs are visually more pleasing for front dormers. 

An L-shaped dormer combines two dormers connected at right angles to each other. The larger dormer sits on the main roof of the property, and the smaller dormer is usually built onto the rear outrigger roof, facing the neighbouring property. They are suitable for a Victorian terraced house or semi-detached home. L-shaped dormers can add the same amount of square footage as that of the first floor. Full-width dormers extend across the entire width and length of the rear or side roof.

While the cost varies depending on the size and design features, the average dormer loft extension can cost £1,250 – £1,450 per square metre in London.

Loft conversions should be carried out lawfully and per building regs. A Victorian terraced house, especially a mid-terrace, needs careful planning and design details that do not hinder neighbours. If your property is within a conservation area, there are additional guidelines to build. Converting loft spaces should not be a DIY project, as there are several specifications and structural calculations to consider. You will need the help of professional architects, structural engineers, and builders to make your project a success.

We have a team of skilled architects, structural engineers, builders, project managers, and project advisors dedicated to your goals. Each project starts with a high-calibre design concept that produces high-quality spaces. Our designs are bespoke and reflect your needs and personal preference while complementing the architecture of your period home. Our 3D simulations will help you visualise the finished result more vividly. From concept to completion, we ensure perfection every step of the way.

Our planning experts prepare permission applications and coordinate with local authorities until planning approval is secured. We assist with party wall agreements, Thames Water build-over agreements, submitting building control applications, and preparing method statements. You receive full project management from start to finish.

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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