Extension layout design
Extension layout design for homeowners who need clarity before committing
You can know that your house needs to change without knowing the best way to change it. Extension layout design is the stage for exploring the practical possibilities before committing to a full project.
We start with the home you have, what you want from it and whatever information is available. That might be plans, photos, a Rightmove link or a rough sketch with arrows all over it.
Short answer
What this means
Extension layout design turns a wish list into workable options, so you can choose a direction before spending on detailed planning, regulation or construction drawings.
For your home
Why it matters
The goal is clarity: what stays, what moves, which option helps most and which next service is actually needed. It is not a substitute for the later technical work where that is required.
Next step
What to do now
Send us the idea in the format you have. We will take a first look, answer what we can and tell you whether a more detailed £250 option pack or another route makes sense.
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 have several possible ways to improve the house.
- You need to turn a wish list into a clearer brief.
- You want to reduce uncertainty before commissioning detailed drawings.
Not the right route if
- A request for engineering calculations without an agreed design.
- A request for a planning or Building Control decision without property information.
What to send first
- your priorities
- a plan, listing or sketch
- photos
- anything that you already know will not work
Related routes
Keep the route connected
Extension floor plan ideas
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.
Open route →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 →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
What is the difference between layout design and full planning drawings?
Layout design helps choose the right option. Planning drawings are prepared once there is a proposal worth submitting and the relevant information has been checked.
Can I use an estate-agent plan?
It is often a useful way to start the conversation. Accurate surveys and technical information are introduced at the stage where they are needed.
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.