Proforma Builder

This proforma is provided for informational and illustrative purposes only and does not constitute financial, legal, tax, investment, or professional advice of any kind. All figures, projections, and outputs are estimates based on user-supplied inputs and generalized assumptions, and are subject to material uncertainty. Actual costs, revenues, timelines, financing terms, and returns may differ significantly from those presented. Construction costs, zoning regulations, permit fees, development charges, land transfer taxes, and financing conditions are subject to change without notice and vary by jurisdiction, project, and market conditions.

Users should independently verify all assumptions and consult qualified professionals — including architects, engineers, lawyers, accountants, mortgage brokers, and real estate advisors — before making any investment, development, or financing decisions. No reliance should be placed on this tool as the basis for any such decision. The creators of this tool make no representations or warranties, express or implied, as to the accuracy, completeness, or fitness for purpose of any information contained herein, and accept no liability for any loss or damage arising from its use.

Toronto Multiplex Proforma Builder

The Toronto Multiplex Proforma Builder is a free, browser-based financial modelling tool designed for developers, investors, and brokers underwriting multiplex and garden suite projects in Toronto and the GTA. It generates a complete, dynamic development proforma — including construction budget, financing analysis, construction timeline, and stabilization returns — instantly from a set of user inputs.

Construction Costs Based on Real Toronto Projects

Construction costs in this tool are derived from actual Toronto low-rise residential and multiplex projects. The budget adapts dynamically to the building's size, unit count, and storey count across 50+ cost components and 8 construction phases — from site mobilization and substructure through interior finishes and closeout. This is distinct from industry cost guides, which provide a broad per-square-foot range that does not account for project-specific variables.

Market Rents Adjusted by Unit Size Across 6 Toronto Submarkets

Rent assumptions are drawn from actual lease data across six Toronto submarkets: East York, Etobicoke, North York, Scarborough, Toronto, and York. Rents adjust automatically based on average unit size, reflecting the market reality that larger units yield less per square foot and smaller units yield more. Rates are updated periodically to reflect current market conditions.

What the Tool Calculates

The tool calculates a full development proforma including: total project cost broken down by construction phase, consultant fees, construction management, contingency, soft costs, land transfer tax, development charges, and financing costs; land and construction loan sizing with LTV and LTC constraints; stabilized value based on a cap rate derived from take-out financing assumptions; net operating income, cash flow, cash-on-cash return, total return on equity, and CAGR on construction equity; and an auto-generated construction timeline with a visual Gantt chart. The tool also incorporates Toronto as-of-right zoning parameters to auto-calculate the maximum multiplex and garden suite GFA for a given lot size.

Who It Is For

This tool is built for missing middle developers, real estate investors, mortgage brokers, and real estate agents working on multiplex, fourplex, and garden suite projects in Toronto. It is particularly useful for early-stage site triage — allowing users to quickly assess whether a site pencils before committing to a full analysis, engaging consultants, or spending money on due diligence. The tool is free, requires no login or subscription, and runs entirely in the browser.