House Alpha

A transparent decision engine for buying, renting, and property strategies.
PRIVATE LIBRARYPlanning model
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Bring saved properties from the original app

Your original Render app is still running. Nothing transfers automatically. Follow these steps in the browser where your properties were saved; importing here leaves the originals intact.

  1. On a computer, drag Export House Alpha library to your browser’s bookmarks bar.
  2. Open the original House Alpha app in the browser/profile where your properties were saved.
  3. While the original app is open, click the bookmark yourself to download your library JSON. It reads only House Alpha’s saved-property list and sends nothing over the network.
  4. Return here, sign in, and choose Import JSON. Keep the export as a backup.

Already saving on this new address while signed out? Use Import this device’s library after signing in instead. Exports contain private addresses and photos.

Your scenario
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Modeled outcome

Loading local assumptions…

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wealth advantage

House Alpha is preparing the comparison.

— Alpha signalDirectional—not a probability
Ending wealthHolding period
Strategy A—
Strategy B—
Show purchase-price position
Purchase-price positionCalculating
Break-evenCurrent
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Location—
Strategy—
Property—
Purchase price—
Financing—
Holding period—
Current rent—
Monthly cash comparison—
Generated—

Home and location

Analyze an actual propertyKeep one real deal attached to these numbers.Address + exact inputs
Use actual-property mode
Protect entered deal facts and add a decision checkpoint.
Saved properties & housing optionsNothing saved yet

Keep a deal library in this browser, or sign in above to sync it privately across devices.

Nothing saved yet. Add a name, park, address, or listing link, then save this housing option.

Price discovery

Purchase price$385,000
Local editable purchase-price estimate
BUYING WINSCLOSE CALLRENTING WINS
Low-down options 0% to 3.5%
Loan typeConventional selected
Only loan types compatible with this down payment are shown. Eligibility still depends on the borrower and property.
Estimate conventional PMI below 20% down
Uses an editable annual PMI rate and automatically stops when modeled loan-to-value reaches 80%.
Financing details Planning model
Planning estimate—not a lender quote. The live benchmark comes from Freddie Mac PMMS. Low-down-payment and government-program rate differences use editable-model planning assumptions; actual pricing depends on credit, points, loan size, occupancy, property type, lender, and eligibility.

Rent-versus-own assumptions

Add renter-paid garage/storage
Adds a separate garage or storage-unit charge only to the renting side.
Optional income & shared housing Roommates, ADUs & duplexes
Renter receives roommate contribution
Reduces the renter’s personal housing cost.
Owner receives housing income
Models a roommate, existing ADU, new ADU, or duplex unit.
Commute comparisonCompare travel from the renting and owning locations.Not modeled
Include commuting in the comparison
Vehicle expense changes the financial result. Driving time is shown separately and is not converted to dollars.

Purchased-property expenses

Include HOA
On by default for condos and townhomes.
Property being purchased garage/storage
Used in owner-occupied primary-residence and live-in-rental comparisons.
Auto-scale insurance with price
Gentler scaling for condos; stronger scaling for single-family homes. Turn off for a real quote.
Local planning estimate will appear after the location loads.
Keep repair reserves separate. Annual maintenance covers routine whole-property upkeep. Rental repair / capex percentages below should cover only turnover and rental-unit capital work not already included here; enter 0% when the annual reserve already covers it.

Growth assumptions

Nominal means before inflation. Defaults use 10% stock total return and 4% home appreciation; choose 7% and 3% for a more cautious stress test.
Advanced growth & transaction assumptions Rent growth & closing costs
Raises rent ceilings after the near-term growth period; it does not inflate taxes, insurance, or storage.
Model details

House Alpha result

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Cash budget

Total monthly cash bill

Calculating the lower-cost option…
Owner cost, month 1
Renter cost, month 1
Initial premium
Strategy A average—
Strategy B average—
Average monthly difference—
What counts in this monthly number?

Recurring modeled cash only. Upfront cash and everyday spending are separate.

Ending wealth

Renter wealth
Buyer wealth
Buyer advantage
Trajectory

Wealth path

Building the timeline…

Strategy AStrategy B
Modeled wealth pathTwo strategies compared over the selected holding period.
Hover, tap, or use the arrow keys to inspect the timeline.
Decision levers

What would change the answer?

Modeled break-even

S&P 500 return sensitivity

Using 10% annual return
Using 7% annual return

Milestones

YearRentOwnerProperty valueLoanRent wealthBuy wealth

Break-even by down payment

Exact model results using the current property, location, and growth assumptions.

DownCash neededOwner/moMortgage insurance / feeBreak-even priceBreak-even rentAdvantage now

Location assumptions and sources

HOA, garage/storage, and insurance are editable planning benchmarks. Small mountain communities often lack enough long-term listings for a statistically stable live average.

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