Likely build costA range shaped around your idea
Inside your report
Free personalised renovation report
Find out what’s really possible with your home
Get a free, personalised first look at your project—built from Dave Chamberlain’s 20 years of experience designing and reviewing thousands of forever homes.
The cheapest time to prevent an expensive mistake is now.
Dave Chamberlain · Founder & Lead DesignerDave ChamberlainReal advice. Plain English.
20 yearsof UK renovation experience
Planning contextThe local flags worth knowing early
Inside your reportPotential valueWhat the finished space could add
Inside your reportAs featured in
Clarity before commitment
Three minutes now could prevent months of wasted time — and thousands in wasted money.
The expensive mistakes usually happen before the build begins. Your free report helps you spot them while the project is still easy to change.
Avoid the pain
What this helps you prevent
- Build costs rising the moment builders start digging.
- Planning enforcement making you change your extension—or tear it down.
- A party-wall dispute with a neighbour bringing progress on site to a halt.
- Applying for planning permission for a design that is far outside your budget.
- Paying architects, engineers or surveyors before you know whether you need them.
Gain clarity
What you’ll know instead
- Get clarity on what your renovation is likely to cost.
- See how much value the finished renovation could add to your home.
- Get an immediate view of whether planning permission looks realistic—and what could get in the way.
- Create the extra space you need—or make your forever home finally work—without overspending.
Real Arkiplan feasibility meetingBuilt from real projects
This isn’t a generic calculator with an Arkiplan logo on it.
I founded Arkiplan after seeing how often homeowners were expected to make six-figure decisions with almost no useful information. Over 20 years, I’ve designed and reviewed thousands of extensions, lofts and whole-home renovations across the UK.
I built this free tool to give you the useful first-pass thinking I wish every homeowner had before they committed to drawings, builders or a particular design.
Dave ChamberlainFounder & lead designer, Arkiplan
Renovation advice people actually use
More than 1,000,000 views on social media.
Straight answers on renovating, extending and buying property—without the jargon or the hard sell.
4.7 out of 5from more than 460 homeowner reviews
Free · about 3 minutes · no obligation
Before you spend a fortune on your home, spend three minutes getting clear.
Add your details, explore the report and see what deserves your attention before you make the expensive decisions.
Show me what’s possible