
Building 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.
Example path ·
https://www.proper-job.uk/api/mcpUse for supported building costs. Reconcile the supplied drawing facts before one consolidated calculation; recalculate only when facts change or an error needs correction. Reuse an unchanged result. Write observation labels and issue descriptions in the conversation language; preserve literal source references. Give the returned rough range immediately, name material assumptions briefly and ask the returned refinementQuestion in one short sentence when present. Do not stop at the price card or wait for Refine budget. Preserve user answers and recalculate after new facts. If the user does not know a detail or wants to stop, keep the broad range and its assumption; do not repeat the question or invent an answer. If no question remains, do not invent one. Country guidance lists possible local checks, not confirmed requirements for every job: keep the full checklist in the card disclosure, and mention an individual check in chat only when relevant or requested. Country, currency, measurement units and conversation language are independent. Country coverage: GB domestic/office guides and UK-only draft drawing cost plans; US supported residential guides; AU/NZ home, extension and kitchen/bathroom guides; IE extension and kitchen/bathroom guides with matching Dublin project references; DE new-home guides and separate unscaled manufacturer starting-price examples; FR new homes, whole-home/bathroom renovation, standard PVC window replacement and air-to-water heat pumps; CA new homes and whole-home renovation with explicit GTA/Vancouver cosmetic references; ES home/kitchen/bathroom renovation and standard PVC window replacement; JP new homes, supported renovations/akiya and kitchen/bathroom work in JPY. IN covers new rural shelters, masonry/RCC homes and whole-home renovation in INR, with optional separate user-supplied land purchase, lease premium and yearly rent. State codes select jurisdiction checks, not verified state prices. Unknown land values remain unpriced. Other countries return quantity reviews without invented foreign rates. EU needs a member country; ZA is South Africa, SA Saudi Arabia. Work levels are Budget, Standard, Premium, Luxury. A build subtotal is not the full project budget; show scopeNote/priceScope and tax basis. Keep research sources, audit dates, policy versions and verification history in the underlying evidence/Markdown; omit them from the ordinary customer card and chat summary unless the user asks. Still show material assumptions, excluded work and tax. Read pricingEvidence internally: source anchors and inferred allowances are not independently verified local bids, and checked quantities do not verify prices. Optional AU/NZ/IE/DE site/access/protection and FR/CA/JP access/climate/site/structure facts refine relevant work only, ordinary local compliance is included once; AlreadyIncluded flags suppress work present in supplied scope, and no region alone proves permafrost or remote access. Japan older-home dates and vacant-home condition are uncertainty cues, not seismic certification. Leasehold land premiums, rent and consents are excluded from construction. No earthquake-proof or regulatory-safety guarantees. Keep missing facts optional; no form or local-quote gate. Set optional language from conversation for core card controls and actions; no translation provider is used. Before drawings read properjob-building-work skill. Drawing attachments are supported in the host chat for every country, including markets with quantity review only. If PDF visuals are inaccessible, use clear page images; never claim unseen pages were read. The host alone reads the user attachments, and sends neutral source-cited structured facts. Never call paid extraction or invent rates; no accounts, saved jobs, server file uploads/downloads, purchase, approval or issued quotation. For legacy guide/comparison tools keep their existing supported contracts.
1 in the ChatGPT listing


