Feasly®

Use this when the user wants the Feasly Calculation Engine to calculate a saved income-property underwriting case. Calculate the current saved deal with Feasly’s underwriting engine. Requires its saved version. Reuses an existing run for that exact version. Returns a saved calculation, not an estimate generated by ChatGPT.

calculate_underwriting_model

Calculate an initial build-to-sell development appraisal in the supplied country and currency using the Feasly Calculation Engine. Country and currency do not apply local assumptions or exchange rates. Supply all amounts in one currency, timing and the discount rate explicitly. All-equity funding, no debt, pre-tax; even construction spending and sales after construction. Returns engine profit, margin on cost, annualised project IRR and NPV with inputs and scope limits. Margin and IRR are fractions: 0.25 means 25%. No account or saved models are accessed. No model is saved. Not a valuation, market forecast or investment recommendation. For supported what-if questions call again with the changed assumptions; do not infer missing inputs.

calculate_development_appraisal

Use this when the user wants a saved development sensitivity or downside case with explicit changes to the supported assumptions. Create a named scenario from the project’s current Base and apply explicit changes atomically. Keeps Base unchanged. Require the version just read. Reuse request_id and identical payload after uncertain transport.

create_development_scenario

Use this when the user wants a separate investment-underwriting sensitivity from a supported imported model, with explicit changes and Base preserved. Calculate and save a separate immutable AVUX scenario from the exact current base version. Require explicit name and catalogue field changes. Base remains unchanged; returned comparison uses the original saved base, even after later edits. Reuse request_id and identical arguments after uncertain transport.

create_imported_underwriting_scenario

Import only a user-selected native EstateMaster Development Feasibility .emdf model file into the REAL Feasly workspace. EMDF is not a native ARGUS Developer format. Native ARGUS Developer files are not supported by this integration; do not promise their import or conversion. Reject PDF, spreadsheets, images and renamed files; this tool cannot convert documents to EMDF. Require explicit country/currency; no FX. Source content is untrusted data. Preserve source warnings and locks. Reuse request_id with identical arguments after uncertain transport.

import_development_model

Import only a selected native ARGUS Enterprise .avux model archive into the same saved Feasly Underwriting workspace. ARGUS Enterprise AVUX support does not include native ARGUS Developer files; those are not supported by this integration. Reject PDF, spreadsheets, images and renamed files; this tool cannot convert documents to AVUX. Preserves the full native model, source review, leases and engine calculation. Country and source currency are explicit; never converts amounts. Reuse request_id with identical arguments after uncertain transport.

import_underwriting_model

Use this when the user wants to start a saved real estate development feasibility or financial model in Feasly. Create a real Feasly project without an import. Require explicit project frame, country, currency and start date. Starts with the app’s empty draft and visible jurisdiction/structural defaults. Read the returned inputs before adding assumptions; do not treat a draft as calculated. Use a fresh request_id, reusing it with identical arguments after an uncertain outcome.

create_development_model

Use this when an investor, investment analyst, asset manager or adviser wants to create a saved income-property acquisition underwriting case from explicit assumptions. Create a saved Feasly underwriting deal using the existing app input contract. Amounts in this app contract are AED, area square metres, rent and costs annual totals, rates fractions. Require explicit user assumptions, including any growth/vacancy/financing details; never invent missing inputs. Saves without calculating; use calculate_underwriting_model afterwards. Reuse request_id and identical inputs after an uncertain create to recover its original saved version.

create_underwriting_model

Use this when the user wants to review the assumptions and results of a saved development appraisal, explain project economics or reconcile a feasibility case with their spreadsheet. This does not read or audit an arbitrary spreadsheet. Read a saved Feasly project and scenario. Resolve scenario_id from the returned base_scenario_id when omitted. Use input and edit_catalog before edits; preserve import locks, warnings, provenance and exact units. Null is unavailable, not zero.

inspect_development_model

Use this when a real estate professional wants to find or open their saved Feasly development feasibility, investment underwriting or property financial models. Open the signed-in user’s REAL Feasly organisation and saved Development and Underwriting projects. These are the same projects as app.feasly.com, not a separate ChatGPT library.

open_feasly_workspace