Extension floor plan ideas
Extension floor plan ideas before you commit to full drawings
You may have an idea for the back, side or kitchen of your house, but not know whether the layout would actually work. That is the point to test the options, before paying for a full set of drawings.
Send an existing plan, a property listing, photos or a rough sketch. It does not need to be neat. PlanBuild will take a first look at the space and help you work out the sensible next step.
Short answer
What this means
Extension floor plan ideas show different ways a home could be extended or rearranged before you settle on a design, apply for planning permission or ask a builder to quote.
For your home
Why it matters
A good first layout does not promise that every idea will be approved or built exactly as drawn. It helps you decide what is worth investigating, what needs changing and whether planning, Building Control or a more detailed design is the next stage.
Next step
What to do now
Send your address, a sketch, estate-agent plan or photos and explain what you would like to change. We will give you a practical first response; if the idea needs proper option testing, the £250 Layout Ideas Pack is there as the next step, not the starting barrier.
Who is behind the advice
Local project advice from Josh and PlanBuild.
The page exists to help homeowners work out the practical route before drawings, structure, permissions and builder pricing become separate conversations.
Who
PlanBuild gives local project advice for homeowners around Poole, Bournemouth and Dorset.
How
We start from photos, address, existing plans, site constraints and the likely approval or build route.
Why
The aim is to point you at the right next step before you waste money on the wrong drawing, quote or contractor conversation.
Good fit
- You are considering an extension but cannot yet picture the best layout.
- You are deciding whether to move or make your current home work better.
- You want to explore options before commissioning planning or technical drawings.
Not the right route if
- You need a guaranteed planning decision without a site and policy assessment.
- You are ready to start building and already have coordinated technical drawings.
What to send first
- Rightmove or property link if there is one
- existing plan or a rough sketch
- a few photos
- what is not working in the house today
Related routes
Keep the route connected
House extension plans
House extension plans can mean anything from an early layout idea to a planning or technical drawing set. The right version depends on what stage you are at and what the project needs next.
Open route →Rear extension layout
A rear extension layout shows how a proposed extension connects to the existing rooms and garden, rather than treating the new square metres as a separate box.
Open route →Planning drawings
Planning drawings explain the existing home, the proposed change and how the project sits on the site so the council can assess it.
Open route →Building Control drawings
Building Control drawings and supporting information help inspectors assess structure, insulation, fire safety, ventilation and the construction details that matter on site.
Open route →Questions homeowners ask
Before you choose the route
Can I send a rough sketch?
Yes. A rough sketch, photos, an estate-agent plan or a Rightmove link are all useful starting points. It does not need to look professional.
Are layout ideas the same as planning drawings?
No. Layout ideas help you choose a direction. If that direction needs planning permission or Building Control, we can then take it into the right drawing stage.
What if I am not ready to pay for drawings?
Send the idea first. We will give a practical first response and explain whether a more detailed layout pack is worthwhile for your project.
Free first response
Tell us what you’re planning.
Whether it’s a bigger kitchen, an open-plan downstairs or a wall you’ve pictured coming down for years, send the details here first. We’ll point you at the cleanest next step:
- “Who do I speak to first?”
- “What’s the actual first step?”
- “Does my project need planning permission?”
- “Do I need Building Control?”
- “Which certificates do I end up with at the end?”
- “Who keeps the whole thing compliant?”
Drop a few details below and we'll tell you who should be involved first: designer, engineer, Building Control or builder.
Start here hub page
Not sure which drawings, approvals or builder route you need?
Use the floor plans hub first. It explains whether your home improvement starts with existing/proposed plans, planning drawings, Building Control, structural calculations or a builder quote pack.
See the floor plans and drawing route →Quickest route: send the project details, or call if it is urgent.