Bay Area housing tools
Numbers first. Then the open house.
BayNest turns Bay Area housing chaos into usable models: affordability, rent-vs-buy, apartment scoring, house-hunt project management, and neighborhood tradeoff data.
Free local starter pack
Get the Bay Area Housing Cheat Sheet
City medians, cash-to-close prompts, transfer-tax reminders, and the tool sequence to run before you tour.
Cheat sheet ready
Open it now, then run the first calculator.
Open cheat sheet
21city affordability models
40+neighborhood records
7live products
Q22026 data snapshot
Why BayNest
Built by Bay Area natives
Generic advice does not survive a Bay Area listing page.
Nick and John built BayNest after watching smart people get crushed by local housing math. We know the Bay because we are from here, and the tools are built from lived local context, repeated buyer/renter conversations, public data, and the very specific weirdness of Bay Area prices, tech compensation, city tradeoffs, and offer culture.
"Get pre-approved" and "save for a down payment" are true but not enough. They do not tell you whether a $985K Fremont townhouse at 6.5% pencils out, how much cash you need after transfer taxes, or which city gets you a similar commute for hundreds of thousands less.
30-yr fixed seed: 6.51%
San Jose median: $1.49M
Oakland median: $729K
21 city models
40+ neighborhoods
Updated quarterly
Not lending, legal, tax, or real estate advice
30-yr fixed seed: 6.51%
San Jose median: $1.49M
Oakland median: $729K
21 city models
40+ neighborhoods
Updated quarterly
Not lending, legal, tax, or real estate advice
Why pay when AI exists?
AI can explain the idea. BayNest keeps the model honest.
A one-off prompt can summarize affordability, but it will not maintain the same assumptions across city medians, DTI, RSU liquidity, transfer taxes, cash reserves, appraisal gap, rent-vs-buy scenarios, and your actual house-hunt pipeline. BayNest products are reusable systems with formulas, tables, source notes, and linked workflows.
The same inputs flow through payment caps, cash-to-close, city fit, reserves, and scenario comparisons instead of disappearing after a chat.
City medians, HOA seeds, transfer-tax planning notes, neighborhood tradeoffs, and source links are preloaded and refreshed.
Spreadsheets and Notion systems preserve what you checked, what changed, and why an offer or apartment won or lost.
Buyer Readiness Pro separates bankable cash from paper wealth, models startup equity haircuts, and exposes the constraint before the deadline.
New city guides
Start by city, then choose the tool.
Bay Area affordability changes block by block. Browse the first city guides for planning seeds, buyer fit, renter fit, hidden costs, and the BayNest tools that answer that city-specific question.
Browse city guidesFree tool sequence
Run the first three checks before a listing gets emotional.
Buying power tells you whether the city is plausible. Cash-to-close shows whether the offer survives escrow math. The cheat sheet keeps the local assumptions close while you compare options.
Paid tool system
Not prompts. Working decision infrastructure.
Each paid tool has structural value: linked formulas, scenario tabs, curated local data, source notes, and reusable workflows that are annoying to rebuild from scratch. Built from Q2 2026 planning seeds with source notes from Freddie Mac, Redfin, Zillow, CalHFA, and city/county pages. Educational use only.
Formula depth DTI, PITI, reserves, closing costs, equity haircuts
Local data city medians, transfer-tax notes, HOA seeds, comparable areas
Workflow memory trackers, scorecards, scenarios, decision logs
Refreshable source tabs and quarterly update process
Detailed pages:
Pro Calculator
Bundle
Affordability
Neighborhoods
Command Center
Rent vs. Buy
Apartment Scorecard
Lane 1Still deciding where or whether to buy?
Best value / 5 tools
00 - Bundle
BayNest Complete Bundle
The operating system for getting oriented: affordability, rent-vs-buy, apartment scoring, house-hunt project management, and neighborhood tradeoffs in one download.
Save $44
5 paid systems
Source notes
01 Affordability Calculator
02 House Hunt Command Center
03 Rent vs. Buy Engine
04 Apartment Scorecard
05 Neighborhood Database
Separate value
$103
Bundle price: $59
Best for buyers/renters still deciding where, whether, and how to move.
Lane 2Already eyeing a real listing?
New $39 Pro
06 - Pro spreadsheet
Best for offer readiness
Buyer Readiness Pro Calculator
For the moment "we can afford something" becomes "should we write this exact offer?" Model cash-to-close, DTI, RSUs, startup equity, appraisal-gap risk, reserves, city fit, and five-year outcomes.
Offer ceiling logic
RSU/startup haircuts
5-year outlook
Instant XLSX download
Preview screenshots included
Quarterly source notes
01 - Spreadsheet
Best for purchase budget
Bay Area Affordability Calculator
Max purchase price, PITI, cash-to-close, city transfer tax lookup, equity inputs, and 21-city comparison.
XLSX model
21 city rows
05 - Database
Best for city tradeoffs
Neighborhood Deep-Dive Database
40+ Bay Area areas with prices, rents, commute signals, schools, walkability, warnings, and comparable neighborhoods.
40+ records
Comparable cities
02 - Notion system
Best for active buyers
House Hunt Command Center
Property pipeline, contacts, neighborhood research, offer stats, calendar, disclosure notes, and move-in checklist.
Notion template
Linked databases
03 - Spreadsheet
Best for stay-or-buy calls
Rent vs. Buy Decision Engine
10-year net worth model, break-even year, sensitivity analysis, opportunity cost, decision memo, and charts.
XLSX model
10-year charts
04 - Spreadsheet
Best for renters
Apartment Hunting Scorecard
Weighted apartment ranking, application tracker, move-in estimator, tenant rights lookup, tour planner, and scripts.
XLSX scorecard
Move-in estimator
Free calculator
Can you actually afford to buy here?
Enter income, debts, savings, equity, stock, startup paper value, and a target city. Get a fast planning answer, then use the full spreadsheet when you need scenario modeling and all 21 city rows.
Run one set of numbers first.
The result panel will show max price, city fit, and modeled cash only after you submit the preview.
Max price DTI plus cash-to-close
City fit Median comparison
Equity stack RSUs, startup value, existing equity
Open the full calculator
Trust layer
Built for planning clarity, not false certainty.
BayNest is intentionally transparent: assumptions are visible, source notes are documented, and tools are framed as educational planning systems rather than advice.
Public data sources such as Redfin, Zillow, Freddie Mac, CalHFA, and city/county pages. Every paid tool is designed with source notes and a refresh process.
No. BayNest is an educational planning toolkit. Verify live rates, taxes, programs, insurance, HOA details, and legal questions with qualified professionals.
Use AI with BayNest, not instead of it. AI helps interpret; BayNest gives you persistent formulas, local data, scenarios, trackers, and decision records.
You get reusable spreadsheets, databases, or templates through Gumroad. The goal is to give you a system you can revisit as listings, rates, and cities change.
Free starter tool
Get the Bay Area Housing Cheat Sheet before you tour another place.
A fast, interactive reference for city medians, buying-power ranges, rent-vs-buy questions, and the assumptions most first-time Bay Area buyers miss.
21 city affordability table
5 min buying-power gut check
Q2 2026 planning seeds
Instant access
No PDF maze. It opens right after signup.
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The cheat sheet is ready.
Open the cheat sheet