Key Takeaways
- Residential appraisals rely primarily on the Sales Comparison Approach with 3-6 comparable sales.
- Investment appraisals require Form 1007 (rent schedule) and Form 216 (operating income statement).
- Low appraisals are common on investment properties; ROVs require comparable sales evidence.
- The Income Approach (NOI / Cap Rate) dominates for commercial and 5+ unit properties.
The appraisal is the lender's independent assessment of collateral value and is one of the most common sources of deal friction for investors. Understanding how appraisals work—and when they can be challenged—is critical for closing deals at expected terms.
Three Approaches to Value
Appraisers use three methodologies: the Sales Comparison Approach (most weight for residential), the Cost Approach (replacement cost minus depreciation), and the Income Approach (capitalized NOI for investment properties). For 1-4 unit residential properties, the Sales Comparison Approach is primary, using 3-6 comparable sales adjusted for differences in size, condition, location, and features. For 5+ unit and commercial properties, the Income Approach dominates, with value determined by dividing NOI by a market-derived capitalization rate.
| Appraisal Method | Primary Use | Approach | Best For | Weakness |
|---|---|---|---|---|
| Sales Comparison | SFR, condos, small multi | Adjusts recent comparable sales | Properties with active comp markets | Fails in unique or rural markets |
| Income Approach | Investment properties (5+ units) | Capitalizes net operating income | Cash-flowing rentals and apartments | Sensitive to cap rate assumptions |
| Cost Approach | New construction, special use | Land value + reproduction cost - depreciation | Properties with no comps or income | Difficult to estimate depreciation accurately |
| Gross Rent Multiplier (GRM) | Quick screening | Purchase Price / Annual Gross Rent | Initial deal screening | Ignores expenses entirely |
| Discounted Cash Flow (DCF) | Institutional analysis | Present value of projected cash flows | Development, value-add, syndication | Highly sensitive to growth and discount rate assumptions |
Appraisal and valuation method comparison. Lenders typically require the Sales Comparison approach for 1-4 units and Income Approach for 5+ units. Source: Appraisal Institute, USPAP Standards, 2024.
Investment Property Appraisal Requirements
Investment property appraisals require additional analysis beyond owner-occupied reports. The 1007 Rent Schedule (FNMA Form 1007) documents the appraiser's opinion of market rent, which is used to calculate qualifying income. The Operating Income Statement (FNMA Form 216) provides income and expense analysis for 2-4 unit properties. Appraisers must also analyze current lease terms, vacancy rates, and comparable rental data. Low appraisals on investment properties are common because appraisers may not fully account for investor market conditions, deferred maintenance repair values, or forced appreciation potential.
Navigating Low Appraisals
When an appraisal comes in below the purchase price, investors have several options: negotiate a price reduction with the seller, bring additional cash to cover the gap, request a Reconsideration of Value (ROV) with specific comparable sales the appraiser may have missed, or switch to a lender willing to use a different appraisal management company. An ROV is most successful when the investor provides 2-3 closed comparable sales that are more similar to the subject than those used by the appraiser. Simply disagreeing with the value without evidence is ineffective.
Go / No-Go Decision Framework
Go Indicators
- ✓Residential appraisals rely primarily on the Sales Comparison Approach with 3-6 comparable sales.
- ✓Investment appraisals require Form 1007 (rent schedule) and Form 216 (operating income statement).
No-Go Indicators
- ✗Assuming the appraised value will match or exceed the purchase price: Low appraisals require additional cash to close, renegotiation, or deal cancellation
- ✗Selecting comps that are not truly comparable (different condition, size, or location): Inflated value expectations lead to disappointment when the appraiser uses more appropriate comparables
- ✗Not meeting the appraiser at the property to provide relevant information: The appraiser may miss recent improvements or fail to use the most favorable comparable sales
Scenario: Responding to a Low Appraisal
An investor contracted to buy a duplex for $425,000, but the appraisal came in at $400,000.
The ROV is supported by two additional comparable sales; the appraiser revises the value to $420,000, reducing the gap to $5,000.
Sources
- Fannie Mae — Appraiser Independence Requirements(2025-01-15)
- FHFA — Uniform Appraisal Dataset(2025-01-15)
Common Mistakes to Avoid
Assuming the appraised value will match or exceed the purchase price
Consequence: Low appraisals require additional cash to close, renegotiation, or deal cancellation
Correction: Always have a contingency plan for low appraisals: negotiate seller credits, bring additional cash, or include an appraisal gap clause
Selecting comps that are not truly comparable (different condition, size, or location)
Consequence: Inflated value expectations lead to disappointment when the appraiser uses more appropriate comparables
Correction: Use comps within 1 mile, sold within 6 months, and within 10-15% of the subject's GLA for realistic value expectations
Not meeting the appraiser at the property to provide relevant information
Consequence: The appraiser may miss recent improvements or fail to use the most favorable comparable sales
Correction: Provide the appraiser with a list of improvements, comparable sales supporting your value, and access to all areas of the property
Test Your Knowledge
1.Which appraisal method is most commonly used for single-family residential properties?
2.What is a key difference between appraising an investment property versus an owner-occupied home?
3.When can a borrower challenge an appraisal that comes in below contract price?