Family members buying property together have no clear framework for splitting down payments, ownership percentages, exit terms, maintenance responsibilities, or what happens when one party wants to leave.
Interactive questionnaire that generates a co-ownership agreement covering equity splits, expense responsibilities, buyout clauses, and dispute resolution — with optional attorney review.
One-time fee ($99-$249) per agreement generated, upsell for attorney review ($300+).
The pain is real and high-stakes. Families are making $200K+ decisions with zero framework. The Reddit thread shows real confusion about splits, exit terms, and maintenance. When co-ownership goes wrong, it destroys relationships and finances. People actively search for answers and find nothing actionable.
Niche but meaningful. Roughly 10-15% of home purchases involve some form of co-buying (non-spouse). That's ~500K-750K transactions/year in the US. At $150 avg revenue per agreement, TAM is ~$75-110M. Not venture-scale, but excellent for a bootstrapped product. The real constraint: it's a one-time purchase tied to a life event, not a recurring daily-use product.
People are about to spend $200K-500K+ on a home. $99-249 for peace of mind and a structured agreement is a rounding error on the transaction. Attorney alternatives cost $3K-10K. Price anchoring works strongly in your favor. The challenge: some will try to DIY with free templates first and only convert after realizing the complexity.
Core MVP is an interactive questionnaire that generates a PDF agreement. No complex integrations needed. Form logic + document generation + payment. A solo dev can absolutely build this in 4-6 weeks using standard web tech. The legal content is the harder part — you need a real estate attorney to draft the template framework, but that's a one-time consulting cost ($2-5K).
The middle market ($100-500 range) between free templates and $3K+ attorneys is almost completely empty. CoBuy is adjacent but focused on the buying process, not agreement generation. No one has built the 'TurboTax for co-ownership agreements' — a guided, interactive, affordable tool that produces a comprehensive document. This is a genuine white space.
This is fundamentally a one-time transaction product. People buy a co-ownership agreement once per property purchase. You could add annual agreement reviews or ongoing expense-tracking tools, but the core product is not naturally recurring. Upsells (attorney review, amendments, dispute mediation referrals) help but don't create true SaaS-style retention.
- +Clear white space: no one owns the affordable, self-service co-ownership agreement market
- +Strong price anchoring against $3K-10K attorney alternatives makes $99-249 feel like a steal
- +High technical feasibility — solo dev can ship MVP in 4-6 weeks
- +Growing market driven by housing affordability crisis pushing more families to co-buy
- +Pain is real, high-stakes, and poorly served by existing solutions
- !Low recurring revenue — one-time purchases tied to infrequent life events require constant new customer acquisition
- !Legal liability exposure: if a generated agreement fails to protect a co-owner, you could face lawsuits. Need strong disclaimers and state-specific compliance.
- !Customer acquisition cost may be high — people don't know they need this until they're already in the buying process, and the window is narrow
- !State-specific real estate law variation means scaling beyond a few states requires ongoing legal review investment
End-to-end co-buying platform that guides friends, family, and partners through purchasing property together. Connects co-buyers with lenders and agents, and helps structure ownership.
Luxury co-ownership platform for second/vacation homes. Buys homes, creates LLCs, sells fractional shares, and handles scheduling and property management.
General-purpose legal document platforms with property co-ownership agreement templates among hundreds of other legal forms.
Specialized law firms
Various sites offering downloadable co-ownership agreement templates and educational guides
A clean web app with a 15-20 question interactive flow covering: party details, contribution amounts, ownership percentages, expense splitting, maintenance responsibilities, buyout terms, death/incapacity provisions, and dispute resolution. Outputs a downloadable PDF agreement. Start with 3-5 states (CA, TX, FL, NY, WA). Add Stripe checkout ($149 base, $249 with attorney review waitlist). Landing page with the Reddit pain signals as social proof.
Free co-ownership readiness quiz (lead gen) -> $99-149 basic agreement -> $199-249 comprehensive agreement with exit/buyout clauses -> $300-500 attorney review add-on (partner with real estate attorneys, take 30% referral fee) -> $49/year annual agreement health check and amendment service -> B2B licensing to real estate agents and mortgage brokers as a co-buying tool for their clients
6-8 weeks. 4-6 weeks to build MVP + 2 weeks for initial legal template review. First revenue likely from Reddit/forum marketing to the exact audience already asking these questions. Could see first paying customers within days of launch if marketed in r/personalfinance, r/realestate, and r/firsttimehomebuyer.
- “My mom was thinking of buying it and I would be a co owner”
- “I would put up around 19 thousand and my mother would put up around 24-25”
- “What happens if you want to move out with your partner?”
- “Who is paying for repairs when they are needed?”