Comp adjustments guide

How to adjust real estate comps without losing the pricing conversation.

Real estate comp adjustments turn comparable sales into a defensible value range. This guide gives agents and investors a practical way to explain size, condition, location, timing, and feature differences without making the CMA feel like a black box.

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The four adjustment buckets that matter most

Size

Adjust for meaningful square-footage differences with a marginal rate, not the full average price per square foot. Extra space is valuable, but it usually is not worth the same amount as the whole property average.

Condition and updates

Account for kitchens, baths, flooring, roof age, systems, and overall showing quality. A renovated comp should be adjusted down when pricing an average subject property.

Lot, garage, and features

Isolate features buyers notice, such as garage spaces, usable yard, pool, basement finish, views, accessory dwelling potential, or outdoor living areas.

Timing and location

Recent sales usually carry more weight. Adjust cautiously for school boundary, traffic, block quality, busy roads, walkability, and market movement since the comp closed.

Simple workflow

A cleaner way to support the recommended price.

The goal is not to make every comp perfect. The goal is to make each meaningful difference visible, reasonable, and easy to discuss with a seller, buyer, or investor partner.

  • ✓Start with the closest closed sales that match property type, size, age, and condition.
  • ✓Remove outliers before doing math, especially distressed sales, family transfers, and unusual concessions.
  • ✓Adjust one difference at a time so the seller or buyer can follow the logic.
  • ✓Compare the adjusted values as a range instead of forcing every comp to support one exact number.
  • ✓Use confidence notes when the comp set is thin, dated, or split across different micro-markets.

Common comp adjustment mistakes

Using average price per square foot for everything

Price per square foot is a useful cross-check, but it can overvalue extra square footage and undervalue condition, layout, lot, and location differences.

Mixing active listings with closed comps

Active listings show seller expectations. Closed sales show what buyers actually paid. Keep them separate when defending value.

Hiding the adjustment logic

A seller-ready CMA should show why each comp moved up or down. If the adjustment is hidden, the pricing recommendation feels like an opinion.

CompIQ uses property and comparable data sourced through RentCast where available. Reports are for pricing support and are not licensed appraisals.

Show the work

Generate a comp report with itemized adjustments.

Run CompIQ on a property you know and get comparable sales, adjustment lines, confidence scoring, and pricing notes in a shareable report.

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