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Zoning & FAR Feasibility Checker
Offer a parcel-aware web tool that translates lot dimensions and local residential rules into a fast feasibility envelope for homes and ADUs. The value is immediate clarity on what can fit on a site before users waste time on impossible concepts or hire professionals too early.
Why this matters
You are interested in building on a specific lot, but the first barrier is not style, it is law. FAR limits, setbacks, height restrictions, parking rules, and local zoning overlays determine whether your idea fits at all. Today that information is scattered across municipal documents and informal expert knowledge, so you either guess or pay someone to interpret it. That creates a frustrating gap: you want to test several concepts quickly, but every concept depends on hidden constraints. A tool that converts parcel and zoning inputs into a clear feasibility envelope would save expensive dead ends and speed up early decisions.
- · Built for Homeowners, small developers, ADU planners, and drafters evaluating lots with setback, FAR, height, and use restrictions..
- · Most likely monetization: SaaS subscription.
The Pain · Narrative
You are interested in building on a specific lot, but the first barrier is not style, it is law. FAR limits, setbacks, height restrictions, parking rules, and local zoning overlays determine whether your idea fits at all. Today that information is scattered across municipal documents and informal expert knowledge, so you either guess or pay someone to interpret it. That creates a frustrating gap: you want to test several concepts quickly, but every concept depends on hidden constraints. A tool that converts parcel and zoning inputs into a clear feasibility envelope would save expensive dead ends and speed up early decisions.
Score Breakdown
Market Signal
Go-to-Market
ADU owners and small residential developers screening candidate lots or planning additions before hiring a designer.
~50K-150K active users annually in North America
SEO long-tail
$99/month
15 paid feasibility reports generated for live parcels in the first month
MVP Scope · 1–2 weeks
- Support manual lot entry for width, depth, setbacks, and max FAR
- Build a rules engine for envelope calculation and allowable floor area
- Render a simple 2D buildable area diagram in browser
- Generate a plain-English feasibility summary with warnings
- Set up a report export with assumptions and disclaimers
- Add address-based parcel lookup for one pilot region
- Create scenario toggles for single-story, two-story, and ADU options
- Implement saved jurisdiction profiles for repeat use
- Add payment wall for report downloads and project storage
- Recruit 10 drafters or ADU consultants to test real parcels and compare against their manual process
Differentiation
Why This Might Fail
Self-rebuttal — the most important trust signal
- 1Jurisdiction coverage may expand too slowly, making the product feel fragmented and not broadly useful.
- 2If results are inaccurate even occasionally, trust can collapse because feasibility mistakes are costly.
- 3Some users may still prefer local experts because edge cases and discretionary approvals cannot be fully automated.
Evidence Summary
How AI synthesized this insight — no verbatim quotes
Several comments directly raised FAR, zoning constraints, and small-lot limitations as critical blockers. The discussion also showed that users want lot-specific design guidance, not just generic floor-plan generation. Repeated references to permitting and code approval indicate that early feasibility is a meaningful step with standalone value, especially for ADUs and constrained urban parcels.
Action Plan
Validate this opportunity before writing code
Recommended Next Step
Build
Strong demand signals detected. Real pain, real willingness to pay — start building an MVP.
Landing Page Copy Kit
Ready-to-paste copy based on real Reddit community language — no editing required
Headline
Zoning & FAR Feasibility Checker
Sub-headline
Offer a parcel-aware web tool that translates lot dimensions and local residential rules into a fast feasibility envelope for homes and ADUs. The value is immediate clarity on what can fit on a site before users waste time on impossible concepts or hire professionals too early.
Who It's For
For Homeowners, small developers, ADU planners, and drafters evaluating lots with setback, FAR, height, and use restrictions.
Feature List
✓ Parcel input by address or dimensions ✓ Automated FAR, setback, height, and lot coverage calculations ✓ Buildable envelope visualization ✓ Constraint-aware concept massing and floor area scenarios ✓ Downloadable feasibility report for architect or permit pre-check
Where to Validate
Share your landing page in r/HN · front_page — that's exactly where these pain points were discovered.
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