The home buying due diligence checklist, with deadlines

What due diligence covers that an inspection does not

A home inspection is a visual, non-invasive examination of the physical condition of what is present the day it is performed. Due diligence is everything else: what is recorded against the parcel, what is buried under it, what the association's finances look like, whether any carrier will insure it, and whether the work you can see was ever permitted. None of it is within an inspector's standards of practice.

The two share one clock, and it is short — seven to fourteen days in most forms, and the only window in which a discovery is actionable. That is little time for work this dependent on third parties, so anything with one in the chain is ordered in the first forty-eight hours.

The checklist in order, with a deadline on every line

The deadline column is the point. Some dates come from the contract, some from a statute, some from a lender's rulebook; confusing them means negotiating the wrong one.

Items 2 and 3: the title commitment, and the part nobody reads

An ALTA Commitment for Title Insurance is the insurer's offer to issue a policy on stated conditions — not a title report, not an opinion of title, not a guarantee of ownership. Schedule A gives the proposed insured, policy amount, effective date, estate, owner and legal description. Schedule B–I lists requirements; B–II lists exceptions — what the policy will not cover.

Standard exceptions are pre-printed: rights of parties in possession, unrecorded easements and mechanic's liens, taxes not yet due, and any encroachment, encumbrance, violation or adverse circumstance an accurate and complete land survey would disclose. Special exceptions are parcel-specific: recorded easements, utility rights-of-way, shared driveway agreements, CC&Rs, severed mineral estates, leases, plat notes and setbacks. Each cites a recording reference, which alone tells a buyer nothing — an easement at Book 412, Page 88 may clip an unusable corner or run down the driveway. Reading those instruments before the title objection deadline is the work.

Survey, encroachments, access, and the mineral estate underneath

Not every drawing of a lot is a survey. A boundary survey locates and monuments the corners; the ALTA/NSPS Land Title Survey is a mostly commercial standard. An Improvement Location Certificate is a Colorado product often mistaken for a survey: C.R.S. § 38-51-108 requires it to state that it “is not a land survey plat or improvement survey plat, and that it is not to be relied upon for the establishment of fence, building, or other future improvement lines.”

What a survey answers is concrete: are the improvements inside the setbacks, is the driveway on the parcel, does the fence match the deed line, is there legal access to a road. Encroachments — a neighbor's fence over the line, a shed in the setback — are a survey finding, not a title finding, and once disclosed the policy will except rather than insure them.

Then what is underneath. Across Texas, Oklahoma, Colorado, West Virginia and much of the mountain West the mineral estate was severed generations ago and is the dominant estate, with an implied right of reasonable surface access: a buyer can own the house, not what is under it, and cannot stop a well pad. Colorado requires an express disclosure at C.R.S. § 38-35.7-108; Texas imposes none.

Owner's title insurance versus the lender's policy

The CFPB draws the distinction plainly: a lender's policy “protects the amount they lend,” an owner's policy “protects the homeowner if someone sues and says they have a claim against the home from before the homeowner purchased it.” Lenders require the first; the second is voluntary.

The lender's policy declines with the loan balance and pays the lender, so a buyer who buys it and declines the owner's policy has bought insurance for someone else. Both are single-premium, and both are retrospective — they insure against defects that existed on the policy date, the reverse of every other policy a homeowner buys.

Seller disclosure, caveat emptor, and the one federal disclosure duty

Seller property disclosure is state law, and it varies enormously: no national form, and with one federal exception no federal duty in a residential resale. Three regimes exist.

Mandatory statutory form states, the majority, require a written disclosure on a statutory template, often with a buyer right to terminate for late delivery. Disclose-or-disclaim states permit a written disclaimer instead. Caveat emptor states retain the common-law rule; Alabama is canonical, and Virginia the most instructive — its Residential Property Disclosure Act requires a statement whose content is a non-disclosure, the owner making “no representations or warranties as to the condition of the real property.” Verify any published list against the statute.

Three exceptions generally survive even there — active concealment, affirmative misrepresentation once the seller speaks, and, where recognized, a duty to disclose latent material defects. Most statutes also exempt fiduciary, estate, trustee, foreclosure and relocation sellers: the transactions where nobody knows the house's history.

The federal exception: lead-based paint

Title X, 42 U.S.C. § 4852d, implemented at 40 CFR Part 745 Subpart F, applies to target housing: pre-1978 housing, excluding zero-bedroom dwellings and most elderly or disabled housing. The seller must give the EPA lead pamphlet, disclose known lead-based paint and hazards, and attach the Lead Warning Statement.

The window is at 40 CFR 745.110(a): “Before a purchaser is obligated under any contract to purchase target housing, the seller shall permit the purchaser a 10-day period (unless the parties mutually agree, in writing, upon a different period of time) to conduct a risk assessment or inspection.” Paragraph (b) lets the purchaser waive it in writing: the initialed box. It is the only federally mandated inspection opportunity in a residential resale, and an opportunity rather than a contingency — any right to terminate comes from the contract. Section 4852d(b)(3) imposes treble damages.

Flood zones, natural hazards, and the environmental record

The FEMA Flood Map Service Center is the official public source for flood hazard information supporting the National Flood Insurance Program, free and searchable. Zones beginning with A or V are Special Flood Hazard Areas — the one-percent-annual-chance floodplain. Zones X, B and C are outside it.

An SFHA triggers the mandatory purchase requirement at 42 U.S.C. § 4012a(b): a regulated lender may not make, increase, extend or renew a loan secured by improved property in an SFHA in a participating community unless flood insurance is in force for the loan's term. Buyers consistently get one thing wrong: many flood losses occur outside SFHAs, where no requirement applies.

California adds a statutory disclosure: Civil Code §§ 1103–1103.14 require a Natural Hazard Disclosure Statement in most sales of one to four units, covering six zones: special flood hazard areas of type A or V, dam failure inundation areas, fire hazard severity zones, wildland fire areas, earthquake fault zones and seismic hazard zones. The form concedes the maps are not definitive indicators.

EPA's Cleanups in My Community maps Superfund sites, brownfields and RCRA corrective action sites, but local contamination usually appears in state databases of leaking underground storage tanks, drycleaners and cleanup registries. Vapor intrusion is the usual pathway.

Underground tanks deserve a line because federal law deliberately does not reach them: 40 CFR 280.12 excludes a residential tank of 1,100 gallons or less storing motor fuel, and a tank storing heating oil for consumptive use on the premises. A buried heating-oil tank is therefore unregistered, often undisclosed, invisible on inspection, and the current owner's problem — and homeowners policies typically exclude pollution cleanup.

Insurability: the CLUE report and the binder deadline

CLUE is the Comprehensive Loss Underwriting Exchange, a LexisNexis Risk Solutions consumer reporting database. Per the CFPB's list of consumer reporting companies, C.L.U.E. Property reports up to seven years of personal property claims, including date of loss, type of loss and amounts paid.

The operational fact: CLUE is a consumer report under the Fair Credit Reporting Act, keyed to the policyholder, so a buyer cannot pull a CLUE report on somebody else's house. Make the seller's delivery of a current report a contract requirement during the inspection period. A prior water, mold or fire claim sits on the history for seven years and can make the house materially more expensive, or uninsurable, for the next owner even if the damage was repaired — and a claim absent from the disclosure form is a very useful document to hold.

Houses are also declined or surcharged for reasons an inspection will not flag as urgent: roof age and remaining life, the most common declination reason of all; Federal Pacific Stab-Lok, Zinsco and Challenger panels; aluminum branch-circuit wiring; knob-and-tube; polybutylene piping; buried oil tanks; unfenced pools; wildfire.

Association documents, reserves, and condo project eligibility

Reading the budget is not due diligence. What predicts an assessment is the reserve study and its percent-funded figure, special assessments approved, pending or merely discussed, litigation — construction defect suits especially, since a project in that litigation is usually unfinanceable — the master policy's deductible allocation between association and unit owner, the delinquency rate, and the last one to two years of board minutes, where problems surface first.

In a few states the clock is statutory and starts only when the documents arrive: Nevada gives five calendar days from receipt of the resale package; Florida's condominium resale provision gives three days excluding weekends and holidays and declares a purported waiver ineffective; Virginia gives three days, or any time before settlement if no certificate arrives. Elsewhere it is contractual and waivable.

Then financing. Under Fannie Mae's selling guide a project is ineligible where conditions significantly impact the safety, soundness, structural integrity or habitability of the buildings, or the project's viability or marketability — mold or water intrusion, advanced deterioration, failure of a mandatory structural safety inspection. Significant deferred maintenance means unfunded repairs above $10,000 per unit due within a year. Under a Full Review the budget must fund replacement reserves at 10% or more of the budget — a reserve study under three years old may substitute — and no more than 15% of units may be sixty days past due.

Florida's post-Surfside resale-package additions — the milestone inspection summary and structural integrity reserve study — exist for this reason: a buyer can be fully approved and still lose the loan because the project fails, and project review happens late.

Permits, unpermitted work, and what it does to a service contract

Permit history is a public record at the local building department, and most metropolitan jurisdictions publish an online search. Ask for the inspection card history along with the permits — a permit that was pulled and never finaled is a live problem, not a closed one.

Compare the permit record against what is physically there: finished basements, attic and garage conversions, additions, decks, second kitchens, accessory dwelling units, re-roofs and panel upgrades. What needs a permit is set by the locally adopted code and its amendments, so check that code rather than a model section number.

The consequences are five separate things. Appraisal and financing: an appraiser who identifies an addition lacking the required permit must comment on the work and its impact on market value, and unpermitted square footage is often excluded from gross living area, which can break the appraisal contingency. Code enforcement: the obligation to legalize or remove runs with the property, not whoever built it, and retroactive permitting means opening walls and meeting current code. Insurance: carriers can deny a claim arising from unpermitted work. The residential service contract: home warranty contracts commonly exclude failures from improper installation or modification and from equipment that does not meet code, and a missing permit is the cleanest evidence an administrator can get. Resale: the disclosure obligation transfers, which is where the discount finally gets taken.

Run the permit search inside the inspection period, the only window in which the discovery is actionable. Every item above carries a date, most inside a period measured in single-digit days, and a buyer who is right but late ends where a buyer who is wrong does.

Frequently Asked Questions