House Extension Design & Planning Services in Barnet, Enfield and North London
We design and deliver high-quality house extensions across Barnet, Enfield and North London, helping homeowners maximise space, improve layout and add long-term value to their property.
Whether you are looking to create open-plan living, extend your kitchen or reconfigure your home, each project is carefully developed to respond to your spatial requirements, budget and planning constraints.
Our approach combines planning strategy, design and technical delivery ensuring your extension is not only well considered, but also achievable and buildable.
Planning Permission for Extensions
The starting point for any extension is understanding what can be achieved under permitted development and what requires full planning permission.
We assess your property at an early stage and advise on the most effective route, whether progressing under permitted development or preparing a full planning application to maximise scale and value.
Our approach starts with planning strategy, ensuring your extension is positioned for approval before design development begins.
By establishing the correct planning route from the outset, we avoid time being spent developing schemes that are unlikely to be approved, allowing the design to progress with clarity and confidence.
Permitted Development vs Planning Permission
Some extensions can be carried out under permitted development, allowing works to proceed without a full planning application, subject to specific criteria.
Where greater scale or design flexibility is required, a full planning application may be more appropriate.
We advise on the most suitable route based on your property, objectives and local planning context.
Designing Your Extension
A successful extension is not just about adding space, it is about improving how your home functions.
We develop layouts that consider:
Natural light and outlook
Circulation and flow
Integration with existing spaces
Furniture layouts and usability
Our aim is to create spaces that feel considered, balanced and practical for everyday living.
Technical Design & Buildability
Once the design is established, we prepare detailed technical drawings to enable accurate pricing and construction.
This includes:
Structural coordination
Construction details
Building Regulations compliance
Coordination with consultants
Well-resolved technical design reduces risk on site and helps ensure that what is built reflects what has been designed.
Types of Extensions We Undertake
We design a wide range of extensions, including:
Rear extensions
Side return extensions
Wrap-around extensions
Double-storey extensions
Each project is tailored to the property, site constraints and planning context.
Why Work With Us
We bring over 20 years’ experience delivering residential projects across Barnet and North London.
Our service combines:
Planning expertise
Design quality
We guide projects from initial concept through to construction, ensuring continuity, coordination and clarity at every stage.
Start Your Extension Project
If you are considering extending your home, we would be happy to advise on the best approach.
FAQs
Do I need planning permission for a house extension?
Many extensions fall under permitted development, but this depends on the property and location. The size, scale and scope of the extension or extensions will also influence this.
How long does an extension take to get planning permission?
Depending on how complex your development is and the timing of client responses, we are able to submit schemes within 3 weeks of site survey. Following client confirmation, planning submissions for residential schemes (non-major schemes) are typically determined within an 8-10 week timeframe with most local authorities.
Please note that there are many factors that can influence the timing of design development and planning submissions, especially where complex planning strategies are being employed or where we enter into negotiations with planning officers.
How long does an extension take to build?
This will vary dependent on the chosen builder. Our recommendation is always to allow sufficient time at tender stage to identify the right builder competitively. With our contract administration services, we will manage the performance of the contracts against the agreed build program to ensure that your expectations and investment is appropriately managed.
Can you help with builders?
Yes, our services include the preparation of detailed technical drawings, construction packages and we can assist through tender and construction. If you utilise our project management, contract administration and turnkey services, we will also manage post completion and handover matters for up to 12 months after completion.