Learning Objectives
- Understand TestFit's role in real estate feasibility and pre-development workflows
- Identify the Site Solver platform and how Generative Design works
- Evaluate when TestFit fits a real estate or AEC team vs Forma, Spacemaker, or manual feasibility
What Is TestFit?
TestFit is a real estate feasibility platform built specifically for real estate developers and architects working on early-stage development feasibility. Where Autodesk Forma targets the architecture profession and urban planning, TestFit targets the developer pro forma — the financial and zoning model that determines whether a piece of land is worth developing and what should be built on it.
The core product is Site Solver: an AI-powered tool that auto-generates thousands of building configurations optimized for the developer's specific KPIs — Floor Area Ratio (FAR), parking ratios, yield on cost, unit mix, residential vs. commercial split. Where a traditional architectural feasibility study takes weeks of iteration, TestFit produces the same exploration in seconds, letting developers test more sites and compare more options.
💡Key Concept
Why developer feasibility is different: Architects optimize for design quality, environmental performance, and code compliance. Developers optimize for return on investment — which depends on parking ratios meeting code, unit mix matching market demand, and yield on cost beating their hurdle rate. Site Solver bakes the developer's pro-forma logic into the generative engine, so the AI returns options ranked by financial KPIs, not just architectural ones. That makes TestFit the dominant feasibility tool for real estate developers in particular.
✅Tip
Visit TestFit: testfit.io — pricing through TestFit sales; volume discounts available for Site Solver subscriptions
Pricing & Access
TestFit is sold as a subscription platform to developers, architects, and real-estate investors. Public list pricing is not disclosed; volume discounts available.
- Generative design + thousands of solves
- FAR + parking + yield on cost optimization
- Volume discounts available
- Thousands of solves in seconds
- Custom KPI optimization
- Multi-family, industrial, mixed-use
- Cities working on housing supply via smarter zoning
- Marked TestFit's 10th anniversary
- Mission-driven outreach
- Standard tier for paid users
- Includes presets and unit configurations
- Multi-firm collaborations supported
- Multi-seat enterprise pricing
- For large developers and AEC firms
- Contact sales@testfit.io
In April 2026, TestFit marked its 10th anniversary with an offer of free one-year platform access for cities working to address housing supply through smarter zoning — meaningful for municipal planning departments evaluating zoning reform.
Core Capabilities
Site Solver — Real Estate Feasibility Platform
The flagship product. Site Solver takes:
- Site geometry (boundaries, setbacks, easements)
- Zoning constraints (height, FAR, density, parking minimums)
- Developer KPIs (target unit count, parking ratio, yield on cost)
- Building typology preferences (multi-family, industrial, mixed-use)
...and produces buildable configurations optimized against all constraints simultaneously. Output includes building footprints, floor plates, parking layouts, and pro-forma-relevant KPIs.
Generative Design (Major 2024-2026 Release)
The newer Generative Design capability lets users define targets with filters like FAR, parking ratio, and yield on cost — then generates thousands of solves in seconds to find the best option for the specific site and KPIs. Users can:
- Sort AI-generated solves by their most important KPIs (FAR, yield on cost, unit counts)
- Import existing unit and building configurations to solve for their own presets without duplicating work
- Explore programs from multi-family to industrial before deciding on the right approach for a site
This is the leap from "1 solve" feasibility (one architect's interpretation) to "thousands of solves" feasibility (computational exploration of the design space).
Multi-Family, Industrial, Mixed-Use Coverage
TestFit handles the major real-estate development typologies — multi-family residential, industrial / warehouse, mixed-use, and increasingly office and hospitality. Each typology has its own constraint profile (parking ratios, unit sizes, ceiling heights, loading dock requirements) that the AI knows.
KPI Sorting and Filtering
After generating solves, users sort by:
- Floor Area Ratio (FAR) — utilization vs zoning maximum
- Yield on Cost — financial return projection
- Unit Counts — total residential / commercial units
- Parking Ratio — spaces per unit / per 1,000 sq ft
- Building Coverage — site coverage percentage
Lets developers quickly identify the highest-yielding configurations for further evaluation.
Preset Library + Custom Configurations
Users can import their own existing unit layouts and building configurations into TestFit's solver — the platform applies the user's presets across thousands of variants rather than starting from scratch. Particularly valuable for repeat developers with established product lines.
Mobile + Cloud Workflow
Cloud-based; accessible from anywhere with web browser. Multiple stakeholders (developer, architect, financial partner) can collaborate on the same study.
Strengths
- Developer-pro-forma-native: Optimization for FAR, yield on cost, parking ratio — the KPIs developers actually care about
- Generative Design release: Thousands of solves in seconds — leap from manual feasibility to computational exploration
- Multi-typology coverage: Multi-family, industrial, mixed-use, office, hospitality
- Preset import: Reuse existing unit layouts across thousands of variants
- 10-year track record: TestFit marked its 10th anniversary in 2026 — mature product with established customer base
- Cloud + collaboration: Multi-stakeholder workflows without version control complexity
- Free city access (April 2026): Mission-driven offering for municipal zoning reform
Limitations & Considerations
- Custom-quote pricing: No public list pricing; engagement through TestFit sales
- Generative Design only in Site Solver: Premium tier required for the full generative experience
- Real estate developer focus: Less compelling for pure architectural design or urban planning vs Forma
- Zoning-data dependence: Quality of solves depends on quality of input zoning data — bad zoning data produces bad results
- Less integrated with broader AEC stack: Compared to Forma's tie-in with Revit + AutoCAD, TestFit is more standalone
- Real estate cycle exposure: TestFit's customer base is concentrated in real estate development — sensitive to market cycles
Best Use Cases
| Use Case | Why TestFit Fits | Caveat |
|---|---|---|
| Multi-family residential feasibility | FAR + parking + unit-mix optimization | Subscription pricing meaningful for solo developers |
| Industrial / logistics development | Loading dock + truck-court constraints baked in | Less mature than residential feature set |
| Mixed-use projects | Combined residential + commercial constraint solving | Complex projects benefit from architect involvement |
| Site selection for repeat developers | Preset import + thousands-of-solves exploration | Best with established product lines |
| Municipal zoning reform analysis | Free 1-year city access program (April 2026) | Marked TestFit 10th anniversary |
When to choose alternatives:
- Architecture-led design exploration → Autodesk Forma for site planning and environmental analysis
- Detailed BIM modeling → Revit + Insight (post-feasibility)
- 2D drafting → AutoCAD AI
- Construction QA and field operations → Trunk Tools
- Custom parametric design → Rhino + Grasshopper for full architect control
- Urban planning at city scale → Forma with microclimate and macro analysis
Key Takeaways
- TestFit is a real estate feasibility platform built for developers and architects, optimizing building configurations against developer KPIs (FAR, parking ratio, yield on cost, unit mix)
- Site Solver is the core product; Generative Design release lets users generate thousands of solves in seconds across multi-family, industrial, mixed-use programs
- Differentiator vs Autodesk Forma: TestFit optimizes for developer pro-forma; Forma optimizes for architectural design quality and environmental performance
- Marked 10th anniversary in April 2026 with free 1-year platform access for cities addressing housing supply through smarter zoning
- Best fit for real estate developers, particularly multi-family residential and industrial development; for architecture-led design or urban planning, Autodesk Forma may serve better
