Bespoke Design & Planning

Over 16 Years of Experience

Free Consultation & Itemised Quotes

Full Cost Transparency & Project Management

Insurance Backed Warranty

Conservatories are no longer simply rooms to house your plants. They have quickly become highly coveted spaces that help transform your home while bringing in great light, views, and ventilation.

The rear conservatory extension is further prized because in addition to being wonderful spaces that are versatile in their design and use, they are perfect for when and if you decide to convert your conservatory into a full-blown extension.

A rear conservatory extension is an opportunity for homeowners to design and create the ideal space in their homes that is the perfect combination of comfort and luxury.

From having a cosy place to curl up with a good book, to an elegant spot to entertain friends and family, with beautiful outdoor views, the conservatory adds incredible style and value to a home.

House extensions come in many shapes and sizes, but are primarily classified into different types based on the area of the property on which they are constructed. And some of the best ways by which you can build an extension, or even transform your existing rear conservatory into an extension, is by constructing these structures:

Rear extensions

Simply transforming the original conservatory space into a full-fledged extension through the addition of a solid roof and walls can provide you with the space for a kitchen extension, guest bedroom, playroom, or even a home office.

Side return extensions

Built on the area that runs along the side of a property, along with a portion of the rear, side return extensions make wonderful dining rooms and help create bright and airy living spaces.

Wrap around extensions

Combining the existing conservatory with a side extension to create an L-shaped structure adds incredible width and depth to your home. This wrap around extension may then be used to design multiple rooms, larger kitchen diners, or even open plan living spaces.

Double storey extensions

Multi-storey extensions essentially double the square footage of the extension without doubling the roofing or excavation costs. They also help create plenty of room and with it, plenty of options for the new space including additional bedrooms, bathrooms, or high-ceilinged dining areas.

Most rear conservatory extensions fall under permitted developments and therefore do not require planning permission. This, however, means that they must meet the specific criteria and limitations of permitted developments such as:

  • The extension must not take up more than half the land around the original house
  • The extensions cannot be higher than the highest part of the existing roof
  • The rear conservatory extension must not extend beyond 6m of the rear wall for a semi-detached house (8m for a detached property).

If planning permission is required, a comprehensive application, including detailed structural diagrams of the proposed extension must be submitted for approval.

In addition to planning permission, building regulations approval and party wall agreements must also be in place before the commencement of the build to ensure that every aspect of the extension meets building guidelines and standards.

Good Design and Build oversee this entire process for our clients. This includes:

  • Initial survey of the location
  • Detailed designing and planning
  • Coordinating with the local council
  • Securing the requisite permissions and approvals

Rear conservatory extensions provide homeowners with a lot of options for how to use the newly-created space. Being ideally placed at the rear of the property, they boast of plenty of space, the perfect amount of privacy, an abundance of sunlight, and beautiful views. This makes them suitable for:

  • Kitchen extensions
  • Dining rooms
  • Playrooms
  • Home offices
  • Gyms
  • Studios

Basically, any room you desire can now be designed and created via the rear conservatory extension.

A conservatory on its own can cost between £10,000 to £35,000. This is because the cost is dependent on a number of factors including:

  • The size
  • The design
  • Groundwork
  • Building materials
  • Fittings and fixtures, etc.

However, if you are planning on transforming your conservatory into a ‘traditional’ extension, it may cost you between £5,000 to £30,000, provided your foundation does not require any additional reinforcement.

Being the primary extension specialists in London, Good Design and Building are without a doubt the leading experts in designing and creating the best bespoke home extensions.

With decades of experience, unmatched expertise, and unparalleled passion, we take immense pride in building exceptional extensions of the highest standards which are backed by warranties.

Our incredible team of surveyors, architects, builders, technicians, and project managers oversee every aspect of the extension build from start to finish; thereby also providing you with an unforgettable, worry-free experience.

From offering free consultations and quotations for proposed extensions, to creating easy payment plans for our clients, we go above and beyond to deliver an incomparable service that results in the creation of stunning extensions that add space, style, and value to your home.

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.

Learn more

Fulham

Orbain Road SW6 7JZ

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

Learn more
Kitchen Extension in East Sheen

Lambeth

Hetherington Road SW4

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

Learn more

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.

Learn more

Leyton

Windsor Road E10

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

Learn more

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