Explore the different types of extensions and what you need to know about planning permission before you build. We help you expand your space with ease, from idea to approval

Add space and value — often without needing permission.
Rear extensions are a popular way to increase living space and boost property value. Thanks to Permitted Development (PD) rights, many can be built without formal planning approval.

Permitted if your extension:

• Extends no more than 3m from the original rear wall (or 4m for detached homes)
• Is no taller than 4m
• Doesn’t cover more than 50% of your land
• Leaves at least 7m of garden space (for two-storey builds)

Bonus:
Since 2021, you may extend up to 6m (or 8m for detached homes) under the Neighbour Consultation Scheme giving you more flexibility.
Before getting started, we will help you understand what is possible and create plans that meet both planning and building regulations.Our team of architects and engineers can create plans that fully comply with all building and planning regulations.

rear extension

Discreet Additions With Big Impact
In many cases, side extensions do not require planning permission, especially if they fall under PD rights.

No permission needed if:

• It is a single-storey addition
• Fits within permitted size limits
• Does not significantly alter the external appearance

You will need planning permission if:

• Your home is in a conservation area
• The extension is close to a public road

Before getting started, we will help you understand what is possible and create plans that meet both planning and building regulations.Our team of architects and engineers can create plans that fully comply with all building and planning regulations.

Side Extension

Maximise Space with Rear + Side Combined

A wrap-around extension connects side and rear additions, creating a large, open-plan layout but this typically means:

Planning Permission Is Required
Combining the two exceeds PD rights. Design considerations must meet local authority criteria.

Before getting started, we will help you understand what is possible and create plans that meet both planning and building regulations.Our team of architects and engineers can create plans that fully comply with all building and planning regulations.

Wrap Extension

Expand upwards with the right guidance.
Two-storey extensions can be done under PD rights, but only if they meet strict criteria.

Permitted Development rules include:

• Must not exceed the height of your existing home
• Roof pitch should match the original
• Materials should be similar in appearance
• Can project up to 3m to the rear
• Must leave at least 7m of garden space

Planning permission is required if:

• Your property is in a conservation area

Before getting started, we will help you understand what is possible and create plans that meet both planning and building regulations.Our team of architects and engineers can create plans that fully comply with all building and planning regulations.

Double-Storey Extension

Expanding your home is an exciting way to enhance your living space and increase property value. At JMP Contractors & Engineers, we specialise in creating bespoke home extensions that perfectly match your needs and lifestyle. Whether you are considering a single-storey, double-storey, or an L- or U-shaped design, we make sure the entire process is seamless, efficient, and cost-effective.

Our experienced team works closely with you to bring your vision to life, ensuring that every detail is crafted to your exact specifications. With careful planning, we guarantee a stunning addition that blends seamlessly with your existing home, boosting both functionality and value.

Let JMP help you create the perfect extension, one that adds comfort, beauty, and long-term value to your home.

Your Home Extension Journey, Made Simple

The JMP RoadMap

We begin your home extension journey with a complimentary, no-obligation consultation. During this initial visit, we assess your space, listen to your ideas, and explore the possibilities. Based on our discussion, we present a detailed proposal outlining the project scope, estimated costs, and a clear timeline.

Once you approve the proposal, we proceed with architectural and structural design. Our team collaborates with you to ensure the plans align with your vision, offering expert guidance on planning permissions and all legal requirements along the way.

Step 1: Consultation & Proposal

Now it's time to bring your vision to life. Throughout construction, your dedicated project manager keeps you informed and involved. Before we hand over the completed project, we conduct a detailed snagging process to ensure perfection. All works are covered by warranty for your peace of mind.

Step 3: Construction & Completion

Step 2: Planning, Design & Payment