A minimum of three closed comparable sales is generally required for a standard residential appraisal, according to guidelines from Fannie Mae and Freddie Mac. While three is the standard minimum, appraisers often use five or more to ensure a credible valuation, especially in complex or non-urban markets, often focusing on sales within the last 6 months.
These comps are recently sold properties used to assist in determining the value of a similar property. Typically, an appraiser will select a minimum of three recently closed sales that closely resemble the subject property in terms of location and relevant characteristics.
According to the rule of three comparables, a real estate agent should compare your property to at least three similar properties to estimate its value. This is a general rule of thumb when selling a house.
Customarily, appraisers will pick three or four comparables for their appraisal. In certain cases, you might find it worthwhile to go beyond this number. If you're a buyer, you might want more to avoid overpayment. Appraisers might include one to two transactions still waiting for closing.
Number of Comps by State
For 39 states and the District of Columbia, over half of appraisals in those states contained five or more comps. The western region of the country has the highest share of appraisals with five or more comps, with California, Oregon, and Arizona as the states with the highest shares.
The "3-3-3 rule" in real estate isn't a single guideline but refers to different strategies: for buyers, it's about financial readiness (3 months savings, 3 months reserves, 3 property comparisons) or a financial affordability check (30% income, 30% down, 3x income); for agents, it's a marketing habit (call 3, note 3, share 3) or prospecting (talking to everyone within 3 feet). There's also a developer rule (1/3 land, 1/3 build, 1/3 profit), though it's considered outdated by some.
The "7% rule" in real estate typically refers to a quick screening tool where an investor checks if a rental property's gross annual rent is at least 7% of its purchase price, indicating a potentially solid income investment, though it's not a substitute for detailed analysis; however, other "7 rules" exist, like those focusing on agent performance (top 7% of agents do most business) or key investment principles (due diligence, diversification, market awareness, clear strategy) for long-term success.
A minimum of three closed comparables must be reported in the sales comparison approach. Additional comparable sales may be reported to support the opinion of market value provided by the appraiser. The subject property can be used as a fourth comparable sale or as supporting data if it was previously closed.
30/30/3 Rule = Homebuying Safety Net: 30% of gross household income, 30% of savings for a down payment, 3x annual income = max home price. Your monthly mortgage payment should not exceed 30% of your gross monthly income.
When talking to a home appraiser, avoid pressuring them for a specific value, asking them to ignore issues, or trying to control their process, as this can be seen as manipulation; instead, provide factual details about upgrades and unique features while remaining polite and objective, letting them do their job. Don't say things like "I need it to appraise for X," "Zillow says my home is worth..." or "Can you leave out the short sales?" because appraisers must stay impartial and can be removed for undue influence.
How accurate is Zillow's Zestimate overall? Zillow reports that the Zestimate is within 2% of the sale price for homes on the market. However, for homes not currently for sale, it can be off by as much as 7% or more. That means a home valued at $500,000 could be off by $35,000.
The main factors that can hurt a home appraisal include undone but needed updates and repairs, the price of comparable properties, market conditions, your home's location, and whether you hired an inspector to flag issues or necessary repairs.
The "3-day appraisal rule" refers to requirements under the Equal Credit Opportunity Act (ECOA) for mortgage lenders to provide borrowers with a free copy of the appraisal (and other valuations) at least three business days before loan closing, and to notify them of this right within three business days of application; borrowers can waive the pre-closing timing, but the lender must still provide it promptly. This ensures borrowers see the property's value before committing to the loan, though the lender must also provide it promptly upon completion, even if the loan doesn't close.
To comfortably afford a 400k mortgage, you'll likely need an annual income between $100,000 to $125,000, depending on your specific financial situation and the terms of your mortgage.
Disorganized or Incomplete Financials
These signal a lack of sophistication and create uncertainty, which buyers translate into either a discounted purchase price or a hard pass. Solution: Engage a qualified CPA to clean up your financials and prepare quality of earnings materials, even informally.
Easily fixable conditions and systems. Even if you think it's minor, systems and even fixtures that you can easily fix can affect your home appraisal. Items like fixtures, peeling paint and lighting may not have a huge impact compared to your home's foundation, but it could signal a poorly maintained property.
The 3-7-3 Rule in mortgages isn't a loan type but a federal timeline from the TILA-RESPA Integrated Disclosure (TRID) rule, ensuring borrower protection by mandating disclosures within 3 business days of application, a 7-business-day wait between the initial Loan Estimate and closing, and another 3-day wait if significant changes (like APR) occur, giving borrowers time to review costs before committing to a loan.