The Mortgage Ledger

Original research

Methodology & Sources

What each dataset on this site is, where it comes from, when it was last verified, and how it gets updated — so you can decide whether to cite it. This page documents the data; for how the calculators do their math, see how we calculate.

What these figures are — and aren't

Everything below is a verified regional average or benchmark estimate compiled from the public and industry sources listed — not live quotes, not offers, and not advice. Medians and averages smooth over real local variation, and we say so wherever they appear.

Each record in each dataset carries its own lastVerified date, stamped when we last checked it against its sources. Those dates surface on the site as “Source … · Verified …” lines next to the figures themselves — the dates you see on-page are read from the data, not typed separately, so they can't drift apart.

When a dataset is re-verified, the records and their dates update together, every page that renders them updates automatically, and derived assets (like the press chart) are regenerated from the data by script rather than edited by hand.

US state housing affordability

51 states + DC · verified 2026-06-30

For every state: the median home price, the income needed to buy it at the standard 28% debt-to-income guideline (benchmark: 6.65% rate, 20% down), the actual median household income, and the gap between them — plus a dual-income flag set where the income needed exceeds 125% of the median household income. This dataset powers the state pages' affordability snapshots and the flagship “29 of 51 states” finding.

Sources: Zillow Home Value Index (state medians, Feb 2026); U.S. Census Bureau American Community Survey (median household income, 2024); Splitero (income-needed benchmark: 28% DTI, 6.65% rate, 20% down).

Medians are statewide — expensive metros and affordable rural areas within one state vary widely. The income-needed figure is a benchmark at fixed assumptions, not a lending decision.

US state legal facts

51 states + DC · verified 2026-06-30

For every state: the foreclosure type (judicial / nonjudicial), typical timeline, post-sale redemption period, anti-deficiency protection, one distinctive legal fact, and a practical buyer tip. Shown on the state pages' legal sections and the regional Learn guides.

Sources: Nolo.com (state foreclosure law summaries, updated May/June 2026); Justia; Bankrate; state-specific legal resources.

General overview only — laws change, and every purchase has specifics. We always pair these facts with a prompt to consult a real estate attorney.

Canadian provincial & territorial data

13 provinces & territories · verified 2026-06-30

For all 13: land-transfer-tax rules and first-time-buyer rebates, mortgage-enforcement method (power of sale vs judicial sale) and typical timeline, average annual home-insurance premium, and the key federal/provincial buyer programs.

Sources: Canadian federal and provincial government sources; Ratehub; WOWA; Pegasus Lending; Ontario Ministry of Finance (verified June 2026).

UK nation data

4 nations · verified 2026-06-30

For England, Scotland, Wales, and Northern Ireland: the transaction tax (SDLT / LBTT / LTT) and first-time-buyer relief, average combined buildings + contents insurance premium, repossession process, and what's genuinely different about buying in each nation.

Sources: Compare the Market (Jan 2026); Go.Compare (Q4 2025); Association of British Insurers (2025/2026); CompareNI.com; Nesto.co.uk; MoneySuperMarket.

US homeowners insurance

51 states + DC · verified 2026-06-30

Average annual premium for every state at one consistent benchmark ($300,000 dwelling coverage, $1,000 deductible), the main cost-driving risk, flood- and earthquake-insurance guidance flags, and documented 2025–26 market issues (e.g. the Florida and California availability crises).

Sources: Insurance.com / Quadrant Information Services (state premiums, March 2026, $300k dwelling / $1,000 deductible benchmark); FEMA NFIP (flood); state programs (earthquake); title-industry norms.

Premiums are benchmark averages for comparison between states — actual quotes vary by home, location within the state, credit, claims history, and insurer.

Canadian home insurance

5 coverage types · verified 2026-07-01

The five coverage types a Canadian buyer needs to understand (home, overland flood, sewer backup, earthquake, title) with what each does and doesn't cover, plus province-level premium averages and risk callouts. Canada's overland-flood model — an optional private add-on — is documented as genuinely distinct from both the US and UK models.

Sources: Insurance Bureau of Canada; Government of Canada (overland flood availability); Ratehub and industry 2025–26 market reporting; provincial premium averages cross-checked against Western Financial and WealthNorth (2026).

Wealth-building figures

5 headline figures · verified 2026-06-30

The homeowner-vs-renter net-worth medians behind the ~40× finding, long-run appreciation rates, and tenure effects. Every figure in this dataset carries its own source field, and on the site each mechanism is always shown next to its honest caveat — including that the net-worth gap is not purely causal.

Sources: Federal Reserve Survey of Consumer Finances / Aspen Institute (net-worth medians); ICE Mortgage Technology; Shiller CAPE housing data; NAR historical data — each figure carries its own source field in the data.

Citing us

The findings on our Data & Press page are free to cite and link with credit to The Mortgage Ledger, and we're happy to pull custom cuts of the underlying data for a specific story — contact details are there.

Educational information, not financial, legal, tax, or insurance advice. Live mortgage rates shown across the site carry their own inline sourcing (FRED, Bank of Canada, Bank of England via ONS) and are documented at how we calculate.