Bespoke Design & Planning

Over 16 Years of Experience

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A rear extension builds onto the back garden across the width of the property. It widens your home footprint by giving you more floor space to extend your kitchen or to add more living areas. As one of the most common single-storey extension types, it proves to be the best way to unify the rear end of Victorian and Edwardian properties. These properties have a less-integrated area at the back – a character found in period properties. Rear extensions London is the modern solution to creating a more open and free-flowing space. It is the perfect method to transition to an open-plan floor area that accommodates the kitchen, a dining area, and a sitting area. Rear extensions can be either single-storey or double-storey.

Media-free lounge room

Invite your friends over to the far end of the house for distraction-free conversations. With the kitchen at an easy reach, you can entertain without having to leave your guest unaccompanied to make the snack and drinks. It creates a peaceful atmosphere for more meaningful conversation without the noise of kids watching TV or playing video games.

A cantilevered roof and timber-clad floor

Allow more space for al fresco dining with a spacious wooden floor extending to the garden and a kitchen framed by glass sliding doors. It is a modernist take on a garden room.

Orangery-style roof

A white-framed orangery-style glass roof with bi-fold doors provide plenty of natural light. With the light from above, you can even separate sections of the extension with white framed glass doors.

Rear Extension bi-fold doors

These are the ideal door types for kitchen extensions and house extensions in London. They brighten up spaces and are completely versatile in creating a more seamless outdoor-indoor integration.

Bathroom/WC

Depending on your needs, you can arrange a floor plan with an extended kitchen as well as a bathroom or a WC.

Utility room

Free up more space in the house by building a utility room for laundry, ironing, and storing items.

Piano studio

You need a bigger space for a piano, and if you are a professional musician giving lessons, you need a dedicated space. A rear extension helps you get creative and design a space with bright aesthetics.

Bedroom

If you need an extra bedroom, a rear extension gives you the additional space to create one. With a double-storey extension, you can build the bedroom upstairs or on the ground floor.

Home gym/Yoga studio

A flexible workout routine makes things so much easier. With garden views on display, you will love working out night or day. A rear extension also provides the best daylight for early morning yoga.

Playroom

A playroom that connects to the garden allows young children the choice of playing indoors and outdoors. You also get to keep an eye on them from the kitchen or a lounge area.

Usually, rear extensions can go ahead without planning permission. Extensions in a conservation area or a listed building need planning approval. The volumetric space allowed for rear extensions have these limitations;

  • Extensions can be only as big as half the garden space
  • They cannot be higher than the highest part of the roof or higher at the eaves than the original eaves
  • Where the extension comes within 2m of the boundary, the height at the eaves cannot exceed 3m
  • An extension cannot extend beyond the rear wall of the existing house by more than 4m if a detached property, or more than 3m for other properties
  • Double-storey extensions must not extend beyond the property’s Rear wall by more than 3m or be closer than 7m of any boundary opposite the Rear wall of the house.

You also need Party Wall Agreements and building control approval to start the process. We manage all planning applications on your behalf.

A Rear extension can cost from £40,000, and a double-storey extension costs you from £75,000 upwards. We provide a non-obligation detailed quote after a site survey. Good Design & Build offers you easy payment plans to help you achieve your home remodelling goals. Our Design and Build phases have separate contracts to break down the process for your convenience.

Get in touch with us to explore design-led bespoke home improvements that bring value, versatility, and modern luxuries to your London home.

Double-storey extension

This two-level extension that has both a ground floor and a second floor is a cost-effective method to increase your home’s square footage using the same roof and foundation.

Living room with views

Your upper storey doesn’t always need to be a bedroom. With floor to ceiling glass windows, it can be a panoramic sitting room looking over your garden. By equating the design to the first floor, bi-folding glass doors can open the kitchen extension to the back garden. If you need an extra bedroom, you can make room for it on the first floor.

Roof terrace

You can open up your new bedroom, sitting room, kitchen, or dining area upstairs to a roof terrace. It is the perfect double-storey extension design if you want more outdoorsy space. It gives you plenty of opportunity for al fresco dining, relaxing in the open air, and for better views.

Pitched roof extension with vertical windows

Match the original house roof with a pitched roof extension that has vertical glazing framed by wood. The roof allows better head height, and the windows enhance the taller look. If the existing house exterior is exposed brick, syncing the style will create a structure more imposing in appearance.

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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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.

Featured Projects

Interior View - Sellons Ave Project

Harlesden

Sellons Ave NW10 4HJ

The project included creating a master bedroom in the loft with an adjoining terrace.

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Fulham

Orbain Road SW6 7JZ

This project was completed in 2023 and the approximate budget was £101,000.

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Kitchen Extension in East Sheen

Lambeth

Hetherington Road SW4

We completed this stunning project for our client Angus in Lambeth.

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Teddington

Station Road SW4 7PA

We completed this exciting project for our clients on Station Road, a quaint residential area in the heart of Teddington.

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Leyton

Windsor Road E10

We completed this kitchen extension on Windsor Road, a charming residential street nestled in the heart of Leyton.

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What Our Clients Say

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Types of extensions

Wrap-around Extensions London

Side Return Extensions London

Garden Office Pods London

Rear Extensions London

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