Cost Per Square Foot Is Only Useful With Context.
Cost per square foot is a ratio, and both halves of it move. Change what you include in cost — hard cost only, or land, soft costs and financing too — and the number changes. Change how you measure square footage — heated area, gross area, garage in or out — and it changes again.
A single cost/SF figure, with no definition and nothing to compare it to, cannot support a decision.
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Hard cost / SF and total cost / SF
Hard cost per SF tells you how efficiently you built. Total cost per SF — land, hard, soft and financing — tells you what the project actually had to sell for. Builders need both, and they should never be mixed in the same comparison.
Compared to what?
Project type
Townhome, SFR, cottage, ADU or DADU. Cost structures differ enough that averaging them hides the answer.
Units
Unit count changes how shared site cost is spread and how much repetition helps.
Geography
Market and submarket: labor, site conditions and review timelines all move cost.
Construction period
When the work was bought. Pricing environments do not hold still.
Project size
Square footage, so fixed costs are spread over a comparable base.
Your own history
Your completed projects, measured your way. The most reliable comparison you have.
The question isn't just what did it cost per square foot? The better question is: compared to what?
Your books hold the numerator
- Records transactionsInterprets project performance
- Tracks job costsCompares job costs across projects
- Organizes cost codesFinds cost trends by category
- Produces financial reportsExplains what the project did
- Reports actual spendingExplains variance
- Focuses on individual transactions and projectsCompares your completed projects
- Records historyHelps you use history on the next project
You need accounting. Bivvit makes that data more valuable.
Related Guides
- Construction Job Costing
How to understand costs by job and cost code.
- Seattle Construction Costs
What drives cost in the Seattle market.
- Infill Development
What makes small-site projects different.
Put It Against Your Own Projects.
Send us the records from a completed project. Bivvit organizes the numbers, shows what happened, and helps you understand what to carry into the next one.
Free Project Snapshot. Every completed project makes your Project Pulse more useful.