Before you buy the plot, find out whether the build stacks up.
ACQUISITION
• Plot or land price
• Legal and purchase fees
• Site, survey and services
Plus a built-in stamp duty estimate — every band threshold and rate is
editable, including the additional-property surcharge, so you can set it for
your nation and your situation.
THE BUILD
• Floor area in m²
• Build cost per m²
• Professional fees, as a % of build
• Contingency, as a % of build
• Other and finance costs
THE RESULT
• Total project cost
• Cost per m², all in
• Estimated end value (GDV)
• Projected equity — GDV minus cost
• Margin on cost
SENSITIVITY
What happens to your equity and margin if the build cost per m² moves. Because
it will.
Build cost per m² is the assumption that decides whether a plot is a project
or a mistake. This shows you how much room you've actually got before it stops
working.
Excel (.xlsx). Works in Microsoft Excel and Google Sheets. Instant download.
Educational tool only. Not financial, tax or construction advice. Build costs
must be checked locally, and the stamp duty figure is an estimate — confirm
with your conveyancer. Correct as of July 2026.
Before you buy the plot, find out whether the build stacks up.
ACQUISITION
• Plot or land price
• Legal and purchase fees
• Site, survey and services
Plus a built-in stamp duty estimate — every band threshold and rate is
editable, including the additional-property surcharge, so you can set it for
your nation and your situation.
THE BUILD
• Floor area in m²
• Build cost per m²
• Professional fees, as a % of build
• Contingency, as a % of build
• Other and finance costs
THE RESULT
• Total project cost
• Cost per m², all in
• Estimated end value (GDV)
• Projected equity — GDV minus cost
• Margin on cost
SENSITIVITY
What happens to your equity and margin if the build cost per m² moves. Because
it will.
Build cost per m² is the assumption that decides whether a plot is a project
or a mistake. This shows you how much room you've actually got before it stops
working.
Excel (.xlsx). Works in Microsoft Excel and Google Sheets. Instant download.
Educational tool only. Not financial, tax or construction advice. Build costs
must be checked locally, and the stamp duty figure is an estimate — confirm
with your conveyancer. Correct as of July 2026.
