Buyer Lane
Watch where the biggest landlords have to stop buying houses, and have the paperwork ready before they do.
Buyer Lane
Watch where the biggest landlords have to stop buying houses, and have the paperwork ready before they do.
Date: 2026-10-29 Form factor: web app Status: Prototype
What it is
Buyer Lane tracks how close large institutional landlords are to a purchase ban that takes effect January 7, 2027, metro by metro. Pick a market and it shows how much of the single-family stock is already held by investors big enough to be covered by the law, plus a sample watchlist of homes currently sitting in those portfolios. A second tool builds the buyer self-certification letter that the law is about to make a routine part of closing.
Who it serves
First-time buyers in Sunbelt metros who keep losing bidding wars to cash offers from the same half-dozen rental companies, and the agents or title processors who'll soon need a quick way to put a certification in front of a buyer instead of writing one from scratch for every closing.
Why it could be profitable
Free tier: browse metro-level investor concentration and generate certification letters, no account required. Paid tier ($7–12/month or a flat per-report fee): zip-code-level drill-down pulled from county assessor LLC-ownership records instead of the sample data shown here, email alerts when a watchlisted address changes hands, and a bulk-export version of the certification generator for agents working multiple closings a month. On the B2B side, title companies and buyer's-agent brokerages are the steadier customer: they need a certification tool at every closing after January 7, 2027, regardless of how buyer demand for the market-signal dashboard holds up.
The law itself is what makes this timely. The 21st Century ROAD to Housing Act became law on July 11, 2026, and on October 22, 2026 the Treasury Department proposed the rule implementing its ban on "large institutional investors" (entities controlling at least 350 single-family homes) buying any more single-family houses, effective January 7, 2027. Violations carry civil penalties of the greater of $1 million or three times the purchase price. The demand case is more assumption than evidence right now. No one has built the buyer-facing version of this yet, but that's mostly because the implementing rule is three days old at the time of writing, not because anyone has tested whether buyers want a dashboard for it rather than a lawyer's one-page memo.
Form factor & scope
Single-page web app. This prototype covers two flows: a sortable metro table with per-market investor-concentration stats and a sample watchlist, and a certification-letter generator that fills in a template from a short form and flags submissions that cross the 350-home threshold.
How to run it
- Open
index.htmlin any modern browser. - Click a row in the metro table to see its sample watchlist and the per-metro unlock estimate.
- Scroll to "Buyer self-certification," fill in the form, and click Generate to see the letter (try entering 350+ homes to see the threshold flag).
Sample data loads from an inline JSON block in index.html so the page works straight from the filesystem — no local server needed.
What's in this prototype
- A law-status strip showing the live countdown to the January 7, 2027 ban and the 350-home threshold
- A sortable table of 15 Sunbelt and Midwest metros with investor-owned share, number of qualifying investor entities, trend, and a projected annual "unlock" (homes that could reach the market with no investor able to buy them back)
- A per-metro detail panel with a sample watchlist of 2–3 listings, each tagged with a fictional holding entity and that entity's portfolio size, with a toggle to mark a listing as watched
- A certification-letter generator that takes buyer name, property address, and homes controlled, and outputs a signed-ready statement citing the statute, with a threshold warning when the input would make the buyer ineligible
Roadmap
- Replace sample metro stats with real county assessor and LLC-registry data
- Alerting when a watchlisted address is sold or when its holding entity's portfolio crosses the 350-home line
- State-specific certification language, since closing requirements vary
- A broker/title-company dashboard for managing certifications across multiple closings
- Historical tracking of investor purchase share by metro, to show the trend before and after the ban takes effect
Sources
- Treasury proposes rule implementing ROAD to Housing Act ban on institutional investor home purchases — threshold definition, effective date, exceptions, and penalty amounts
- Federal Register: 21st Century ROAD to Housing Act Prohibition on Large Institutional Investor Purchases of Single-Family Homes — the proposed rule itself, published October 23, 2026
- 21st Century ROAD to Housing Act (Wikipedia) — enactment date and legislative background
Requirements
Buyer Lane — Requirements
Goals
- Show, for a given metro, how much of the single-family housing stock is held by investors large enough to be covered by the ROAD to Housing Act's purchase ban.
- Give a buyer or their agent a certification letter they can attach to an offer, with a clear flag if the stated portfolio size would make the purchase prohibited.
- Make the January 7, 2027 effective date and the 350-home threshold visible on every screen, since both are the facts a user needs to act on.
Primary user
A first-time or move-up buyer shopping in a Sunbelt metro where cash offers from rental companies routinely beat owner-occupant offers, or the buyer's agent/title processor handling that buyer's closing. They want to know whether competition from large investors is easing in their market and need a certification statement ready for closing without drafting one from scratch.
Functional requirements
- FR1: Display a table of metros with total single-family homes, investor-owned share, number of qualifying investor entities, trend, and projected annual unlock.
- FR2: Support sorting the metro table by investor-owned share, projected unlock, or metro name.
- FR3: Clicking a metro row opens a detail panel for that metro without navigating away from the table.
- FR4: The detail panel shows a plain-language summary of the metro's investor concentration and unlock estimate.
- FR5: The detail panel lists a watchlist of sample properties held by qualifying investors, each with address, size, estimated price, holding entity, and that entity's portfolio size.
- FR6: Each watchlist item has a toggle to mark it as watched, with the toggle state reflected immediately in the button label and style.
- FR7: A law-status strip, visible without scrolling, shows a live countdown to the ban's effective date and the 350-home threshold.
- FR8: A certification form collects buyer name, property address, homes controlled, and whether the buyer is purchasing jointly with others.
- FR9: Submitting the certification form generates a formatted statement citing the statute and the stated facts.
- FR10: The generated statement is flagged if the stated homes-controlled figure meets or exceeds the 350-home threshold.
- FR11: The generated certification can be copied to the clipboard with one click.
- FR12: All market and listing data loads from a bundled JSON block so the page works when opened directly from the filesystem.
User stories
- As a buyer comparing metros, I want to sort by investor-owned share, so I can find markets where competition from large investors is lightest.
- As a buyer curious about a specific market, I want to see sample properties held by qualifying investors, so the abstract percentage becomes a concrete picture.
- As a buyer tracking a property, I want to mark it as watched, so I remember which addresses I've already looked at.
- As a buyer about to make an offer, I want to generate a certification letter, so I'm not drafting legal language from scratch at closing.
- As a buyer whose household owns rental property, I want to be warned if my stated portfolio crosses the threshold, so I don't submit a certification that turns out to be false.
- As an agent working several closings a month, I want the certification output in a copyable, printable format, so I can attach it to an offer packet quickly.
Non-functional requirements
- The page must render and be fully interactive when opened directly via
file://, with no build step or local server. - All data must come from the bundled sample set; no outbound network calls.
- The layout must remain usable on a phone-width screen (collapse the qualifying-investors column, stack the law-status strip).
- Table and form interactions must have visible focus states for keyboard use.
Out of scope (for the prototype)
- Pulling real county assessor or LLC-ownership records.
- Verifying a certification against any registry; the tool only flags the number the user types in.
- State-specific certification language or e-signature.
- Accounts, saved watchlists across sessions, or alerting.
Open questions
- Will individual buyers actually seek this out before shopping, or does the certification generator only get used once an agent or title company hands it to them at closing?
- Once the implementing rule finalizes, will the certification format need to match a specific HUD or Treasury template rather than the plain-language version here?
- Is zip-code-level investor-ownership data available cheaply enough to support the paid tier, or does it require a paid data vendor that erodes the margin?
