Proper Job
ChatGPT pluginBuilding cost calculator
Estimate building and renovation costs from what you know, then refine the price with size, location, scope and readable plans.
Uses country-specific benchmarks in local currency for supported work in the United Kingdom, United States, Australia, New Zealand, Ireland, Germany, France, Spain, Canada, Japan and India. Available work types vary by country. Unsupported work is identified rather than priced as if supported.
Compare Budget, Standard, Premium and Luxury in the interactive card. Use metric or imperial measurements; Japanese inputs also support tatami and tsubo. See the price breakdown and add optional details without starting again.
When you attach readable drawings in ChatGPT, ChatGPT reads them and Proper Job calculates from the extracted quantities and scope. The calculator does not use a paid Proper Job drawing-extraction service or access your saved Proper Job jobs. ChatGPT account and attachment limits still apply.
Prices are budget estimates, not quotes or professional advice. Check the stated assumptions, exclusions and applicable local requirements before committing to work.
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Rank in Productivity
In its category
How this plugin compares with others in the same category. Positions are counted within the category, not across the whole directory.
Productivity1,622nd of 2,146 by placement
| # | Plugin | Position | 7d |
|---|---|---|---|
| 1620 | #7119 | — | |
| 1621 | #7120 | 243places down | |
| 1622 | #7124 | — | |
| 1623 | #7132 | — | |
| 1624 | #7134 | 117places down |
Example prompts
- “Estimate a 30 m² rear extension in Bristol BS3, Standard finish, living space only.”
- “Estimate a 500 sq ft backyard studio in Texas, Standard finish, with a bathroom.”
- “Estimate a Tokyo condo renovation with a new kitchen, flooring and six replacement tatami mats.”
Skills
properjob-building-work
Calculate repeatable building, extension and renovation budgets with country-specific benchmarks, checked metric/imperial arithmetic, scope allowances and host-read drawing quantities. Supports local-currency pricing for GB, US, AU, NZ, IE, DE, FR, ES, CA, JP and IN within stated work limits.
- Categories
- Sign-in
- On Install
- Capabilities
- Interactive, Read
- Availability
- Available
- Version
- 1.1.0
- Created
- September 4, 2026
- More info
- Sponsorship
- Promote this plugin