4220 N 20th Ave, Phoenix, AZ 85015

Office · Phoenix · Phoenix metro, AZ

One of 3,438 reachable office buildings in Phoenix. Larger than 67% of office buildings in Phoenix (median 7,437 SF), derived from assessor records.

County gross building area
11,943 SF, Maricopa County Assessor
Lot size
23,562 SF, Maricopa County Assessor
Year built
1982, Maricopa County Assessor
Stories
3, Maricopa County Assessor
Predominant use
Medical Clinic, Maricopa County Assessor
Assessed value
$1,992,123, per the Maricopa County Assessor (not a market appraisal)
Assessed value per building SF
$166.80/SF, derived from assessor records
Building area / lot
0.51, derived from assessor records
Vintage
1980s vintage
County use code
MEDICAL CLINIC

Nearby comparable buildings

Same building type, by distance. Assessor facts only; not an opinion of value.

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Sale history and market context

MakeMe Estimate: $2.23M (estimated market value), with a likely range of $1.78M to $2.64M (half of recent verified sales in this segment landed inside that range). Computed as the county's full cash value of $1,992,123 times a 1.12 market ratio, measured from 3891 verified arm's-length sale prices vs county values (office sales in Phoenix, through 2026-06-29). Not an appraisal. How this estimate works.

lower confidence: 18 comparable sales within 3 miles; nearest 0.8 mi. This property type carries wider measured error; treat the estimate as a starting point. Last arm's-length sale: $1,750,000 in 2022. The market has moved since; the estimate reflects current county values and ratios, not that price.

Comparable sales used as evidence

Recorded arm's-length sales of similar buildings nearby; nearer and more recent sales rank first. The strongest 5 of 18 nearby verified sales are shown. Buyer and seller names are withheld. Get this data via API.

Market context: Office in Phoenix

median verified sale $217.33/SF over the trailing 24 months; 111 sales in the last 12 months and 225 in 24 (newest verified sale 2026-05); the middle 80% of recent sales traded at 0.73x to 1.73x their county full cash value, median 1.16x (224 sales with usable county values).

  • 2022: $166.43/SF median (93 sales)
  • 2023: $175/SF median (78 sales)
  • 2024: $220.98/SF median (105 sales)
  • 2025: $223.09/SF median (128 sales)
  • 2026 YTD: $192.75/SF median (25 sales)

This estimate sits at 1.12x county full cash value, the 45th percentile of those recent sale premiums.

Computed from 1,330 verified arm's-length sales in Maricopa County public records (225 in the trailing 24 months). Free public records. Not an appraisal.

Last sold: 2022-06-01 for $1,750,000 (recorded arm's-length sale).

Current ownership dates to 2022 (about 4 years) per recorded transfers.

Source: Maricopa County recorded sales extract; buyer and seller shown only when a company or organization. Individual names are withheld.

Value over time

$0$1M$2M$3M20262027$2.23M$1.99MCounty assessed valueMakeMe Estimate range

Dark line: county assessed value per Maricopa County tax rolls. Blue line: our estimate; dashed years are a modeled backcast built from recorded arm's-length sales in the building's segment, not estimates published at the time, and years without enough sales stay unmodeled. The shaded range is the model's measured error band; about half of verified sales in the segment land inside it. Diamonds: recorded arm's-length sales. Not an appraisal. How this estimate works.

Land, site, and value history

Assessed value moved from $1,984,293 (2026) to $1,992,124 (2027), up 0% over 1 years, per county tax rolls. The 2027 roll splits $1,992,124 into $333,800 land and $1,658,323 improvements.