Can I extend
my home?
Most homeowners don't know their home has more potential than they think. Find out in minutes — get a professionally designed extension with costs and planning compliance, powered by AI.
Simple process
How it works
From floorplan to proposal in three steps. No architect needed, no waiting weeks.
Upload your floorplan
Take a photo of your property's floorplan — estate agent brochure, architect drawing, or even a hand sketch. We accept any format.
Our AI analyses your property
We cross-reference your floorplan with UK planning rules, your property boundaries, and local authority records to identify your extension options.
Get your extension proposal
In minutes you receive a complete extension design, cost estimate, planning compliance check, and comparison with similar properties nearby.
Your proposal includes
Everything you need to decide
No more paying thousands for a feasibility study. Get the same quality insight in minutes.
Extension design
A scaled architectural drawing of your proposed extension, showing the new layout alongside your existing floorplan.
Planning compliance check
We check your extension against Permitted Development rights and local planning rules — so you know before you build.
Cost estimate
A realistic cost breakdown for your extension based on current UK build rates, your location, and extension type.
Neighbour comparison
See what similar extensions nearby have been approved for, with actual costs and planning outcomes.
Real output
Sample results
Here's what a typical Can I Extend report looks like.
Proposed: 4.5m rear single-storey extension. Adds approx. 28m² to ground floor.
Who is it for
Made for UK homeowners
Whether you're curious, planning, or buying — Can I Extend gives you the information you need.
Homeowners curious about their options
You live in a house and wonder — could I get more space? Could I extend into the garden? Is it even allowed? We give you a clear answer.
Buyers evaluating potential
Viewing a house and wondering if the kitchen could be bigger? Check extension potential before you make an offer.
Owners planning their next move
Extend and stay, or sell and move? Understanding your extension options helps you make the right decision for your family.
Why trust us
Built on real data
Not guesswork. Not generic estimates. Can I Extend is built on UK planning law, local authority data, and real build costs.
UK planning expertise
Built on the General Permitted Development Order 2015 and updated for local planning authority variations across England.
Local data
We cross-reference Land Registry data, planning applications, and property sold prices to give you local context.
Real build costs
Cost estimates are based on current UK build rates from RICS data, updated quarterly, adjusted for your region.
Privacy first
Your floorplan and property data is processed securely and never shared. GDPR compliant, hosted in the UK.
Early access
Your home has more potential
than you think
Join the waitlist and be among the first to find out if you can extend. We'll let you know as soon as early access opens.