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The quiet town of Erith plays host to many young families eager to settle down in Bexley. With it’s well-known pier, leisure centres, and festivals, it is the perfect place to spend weekends with family and friends. And the affordable housing makes Erith especially appealing to homeowners.

But growing families can often make for cramped living spaces. This is where home extensions come in.

Home extensions allow homeowners to combat the lack of space, and it proves to be a more affordable and convenient option compared to the alternative of moving houses.

But home extensions must be done with care and attention to detail in order to create a unique space within your home that not only adds space, but also adds value. To achieve this, the best home extension specialists in Bexley are just a call away.

A house extension is an opportunity to increase the living space within your home.

Home extensions allow property owners the chance to expand and modernise their homes to suit their needs and lifestyles. Home extensions are also perfect for adding value to a home.

Homeowners can design and build their extensions according to their requirements and construct a unique space of their own creation.

The type of house extension depends on the area available within the property, the additional space required, and the budget allocated. House extensions vary in their complexity and as such, careful consideration must be given to its design. The types of house extensions commonly found in Erith include:

Rear extensions – A popular choice for most homeowners due largely to the area available at the rear of most properties. Rear extensions can be designed to create kitchen extensions, guest rooms, or office pods.

Wraparound extensions – Wraparound extensions are essentially a combination of rear and side extensions that form an L-shaped structure. These extensions are ideal for bringing in more natural light into a home and add great value to a property.

Side return extensions – These extensions utilise the area that runs along the side of a property and a portion of the rear area. They are preferred by many as they do not take up too much of valuable garden space. Side return extensions are ideally suited for creating the much-coveted indoor-outdoor connections featured in modern dining rooms.

Multi-storey extensions – Home extensions may be of the single-storey or multi-storey variety. Though single-storey extensions are simpler to design and build, many homeowners opt for two-storey extensions as they add incredible floor space to a home.

Most likely, yes. Though some extensions fall under permitted developments, most home extensions in Erith require planning permission.

This is because planning permission is required for all extensions that exceed the size and height specifications of permitted developments, as well as those extensions which are built on properties listed in conservation areas.

Applications for planning permission require a comprehensive survey of the location along with structural diagrams of the proposed extension.

In addition to this, homeowners must also secure building regulations approval to ensure that the extension meets the requisite building guidelines and regulations.

To create a seamless integration with the existing structure, home extensions must be designed taking into account the architecture and design requirements in order to maintain architectural integrity. Some of the popular designs featured in home extensions in Erith include:

Kitchen extensions –

A classic home extension design, kitchen extensions add great value to a property. They are perfect for converting small kitchen-diners into warm and inviting spaces ideal for hosting family dinners and celebrations.

Loft conversions –

Loft conversions are incredibly versatile and can be designed to create additional rooms, playrooms or home offices. Converting awkward and often ill-used loft spaces into valuable floor space, help make loft conversions a popular home extension style.

Refurbishments –

Even if an extensive extension is not constructed, the existing space can still be transformed via refurbishments and renovations. Changing the layout, creating open floor plans, and optimising the natural light through cleverly-placed windows, helps to create larger and brighter living spaces.

The cost of a home extension in Erith depends on a number of factors such as:

  • The size of the extension
  • The type/ complexity of an extension
  • Location
  • Groundwork
  • Building materials
  • Fittings and fixtures
  • Specialists’ fees

Based on these factors, the cost of an extension can range from £35,000 to £120,000.

Good Design and Build offer free consultations and quotations for proposed extensions. This allows homeowners to design and build their extensions in accordance to their specific budgets.

Good Design and Build are the primary home extension specialists in Bexley and its surrounding areas. This is because we offer complete project management of the extension process from start to finish. This includes:

  • Survey of the location
  • Architectural diagrams
  • Contractual work
  • Technical expertise
  • Daily on-site management of the build

Our team comprises of surveyors, architects, technicians, builders, and project managers. This expertise, coupled with years of experience, allows us to provide exceptional design and building services that help us create bespoke home extensions perfectly suited to your specifications.

Our unmatched professionalism, passion, and proficiency enable us to construct the ideal home extension for you, allowing you to enjoy the incredible new space in 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.

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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

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