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Home Extension Plans & Drawings
Let us plan it so you can live it.
Running out of space at home? An extension is one of the most effective ways to create the extra room that you need, without the cost and disruption of moving.
At Plan It UK we create extension plans and drawings that are designed not just to look good, but to work in practice; and because we offer everything under one roof, getting started couldn’t be simpler!

What are Extension Plans?
Extension plans are detailed drawings that show how your home will be extended. These are required when submitting a planning application and are also used by builders to understand how the project will be constructed. Getting this stage right is essential as it sets the direction for everything that follows.
A well prepared set of plans will include:
- The existing layout of your home.
- Planning drawings which include the proposed changes and new spaces.
- Construction-ready technical drawings including structural elements.
- Information required for planning and building regulations.


Types of Home Extensions
The right type of extension depends on your home and what you would like to achieve. Below are some of the most common options that we see but if you have something bespoke in mind, the Plan It UK team will work with you to design a solution that fits your needs:

Rear Extensions
Perfect for opening up kitchens to create a direct route onto gardens or simply to provide more space in a busy part of the home.

Side Extensions
A great way to use unused space at the side of your property, without impacting your garden.

Side Return Extensions
Popular in terraced and semi-detached homes and ideal for widening narrow kitchens and bringing in more natural light.

Wrap-Around Extensions
Perfect for opening up kitchens to create a direct route onto gardens or simply to provide more space in a busy part of the home.

Loft + Single Storey Extension
Perfect for opening up kitchens to create a direct route onto gardens or simply to provide more space in a busy part of the home.
How it Works?
We’ve refined a process that not only makes sure nothing is missed, it also guarantees that nothing is left for you to figure out alone. Every stage of the design journey flows into the next, giving you a clear path from concept to construction.
Here’s What to Expect:
- A detailed survey of your property.
- Existing drawings that reflect your home as it is today.
- Proposed designs based on your ideas and requirements.
- Planning application submission and full communication with the council.
- Structural calculations for all key elements.
- Building regulations drawings and technical details.
- Coordination with third-parties where needed.
- Support in selecting and preparing your builder.

From First Ideas to Reality
Initial Survey
Every extension starts with a clear understanding of your home and what you want to achieve. We begin by surveying your property and preparing accurate existing drawings, to give a solid overview to work from.
Proposed Design
From there, your proposed design is developed around your requirements, which will make sure that the layout, space and overall feel work for the way you live.
Structural Detail
Structural design is a key part of any extension and covers elements such as steel beams, foundations and load-bearing changes. In this stage we will also include the technical and structural information needed for building regulations and for the construction itself.
Comprehensive Design Support
Because our Design Process is handled under one roof in a coordinated way, each step builds naturally on the last, helping your project to move forward clearly and without unnecessary delays.
Planning Permission & Approval
In many cases, planning permission is required before building work can begin. At Plan It UK we manage the entire planning process on your behalf, including preparing and submitting your application and handling communication with the council.
With a planning approval rate of around 96%, you can rest assured that we will do everything we can to keep your project on track.
Approval Rate



Supporting You Through the Build
Over the years, our approach has led to us being recommended by more than 50 extension building companies across London, Kent and Essex. These are contractors who rely on clear, well-prepared plans to deliver successful builds and who trust the quality and consistency of our work.
You’re welcome to work with your own builder and we can help to make sure that your builder fully understands the project before work begins, or, we can introduce you to one of our contractors, all of which we’ve worked with previously.
During your build, if any questions or issues come up, we’re always here to help; you’re never left dealing with things on your own. With nearly 2000 extension projects so far, the Plan It UK have seen it all, and there’s no issues to-date that we haven’t been able to provide a solution for.
Costs
One of the biggest questions we are asked is about cost. As each extension is bespoke to your property, the cost can vary and comes down to:
Size
Type of Extension
Chosen Finish/Materials
Whether Your Home Has Any Regulatory Restrictions
At Plan It UK we believe in being transparent from the outset, which is why our services are offered at fixed prices. You will know exactly what to expect with no hidden costs as your project progresses.
For an accurate estimate though, it’s always best to consult with one of our team, but we’ve also put together this handy guide to costs that may be included.

“We are so happy we picked Plan It to design and manage our extension! Harry & Frazer made us feel so comfortable throughout the process, which is important when you are making decisions that can sometimes cost a lot of money. Based on our experience I would highly recommend - communication 10/10. Customer service 10/10. Quality of work 10/10. Just a generally helpful and knowledgeable team who can’t do enough to ensure your project goes well!!!!!”
Conor W
Why Choose Plan It UK
5* Google Rating
Full turn key service, all in one place.
In-house structural engineering.
Nearly 2000 extensions completed.
96% planning approval rate.
Personal, 1-to-1 support throughout.
Fixed-costs from the outset.
Start Your Extension Project?
If you’re thinking about extending your home, we’re here to help you take the next step. Simply tell us about your project and we’ll guide you through what’s possible; clearly, simply and without pressure. Book your free consultation with us today and together we can start planning your new home.
