13945 W Grand Ave, Surprise, AZ 85374

Office · Surprise · Phoenix metro, AZ

One of 293 reachable office buildings in Surprise. Larger than 74% of office buildings in Surprise (median 6,500 SF), derived from assessor records.

County gross building area
15,448 SF, Maricopa County Assessor
Lot size
2,238 SF, Maricopa County Assessor
Year built
2004, Maricopa County Assessor
Stories
1, Maricopa County Assessor
Buildings on parcel
2, Maricopa County Assessor
Predominant use
Medical Condominiums, Maricopa County Assessor
Assessed value
$665,000, per the Maricopa County Assessor (not a market appraisal)
Assessed value per building SF
$43.05/SF, derived from assessor records
Building area / lot
6.9, derived from assessor records
Vintage
2000s vintage
County use code
MEDICAL CONDOMINIUMS

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: $841K (estimated market value), with a likely range of $672K to $998K (half of recent verified sales in this segment landed inside that range). Computed as the county's full cash value of $665,000 times a 1.26 market ratio, measured from 3891 verified arm's-length sale prices vs county values (office sales in Surprise, through 2026-06-29). Not an appraisal. How this estimate works.

lower confidence: 10 comparable sales within 3 miles; nearest 0 mi. This property type carries wider measured error; treat the estimate as a starting point. Comparable-sale caveat: the estimate is 77% below the $235.48/SF median of the shown comparable sales.

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 10 nearby verified sales are shown. Buyer and seller names are withheld. Get this data via API.

Market context: Office in Surprise

median verified sale $148.21/SF over the trailing 24 months; 9 sales in the last 12 months and 15 in 24 (newest verified sale 2026-01); the middle 80% of recent sales traded at 0.73x to 1.60x their county full cash value, median 1.31x (15 sales with usable county values).

  • 2023: $182.64/SF median (5 sales)
  • 2024: $79.79/SF median (7 sales)
  • 2025: $235.48/SF median (8 sales)

This estimate sits at 1.26x county full cash value, the 33rd percentile of those recent sale premiums.

Computed from 75 verified arm's-length sales in Maricopa County public records (15 in the trailing 24 months). Free public records. Not an appraisal.

Last sold: 2010-12-01 for $265,000 (recorded arm's-length sale).

Current ownership dates to 2010 (about 16 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$250K$500K$750K$1M20262027$841K$665KCounty assessed value

Dark line: county assessed value per Maricopa County tax rolls. Diamonds: recorded arm's-length sales.

Land, site, and value history

Assessed value moved from $633,600 (2026) to $665,000 (2027), up 5% over 1 years, per county tax rolls. The 2027 roll splits $665,000 into $133,000 land and $532,000 improvements.