Real Estate Data API

51003 Alton

9 active listings out of 791 total properties we track in ZIP 51003 (Alton, IA) — listings, off-market homes, rentals, and full sales/tax history. Refreshed nightly.

Get this data → API docs
Active
9
Median
$250K
±0%
Sales (12mo)
27
Tracked
791
Zoomed out

While you're here, take in the bigger picture — maps below show Iowa (statewide), not just 51003. Same company, same dataset, different resolution.

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Key Numbers
Tracked
791
Active
9
Median list
$250K
Sales (12mo)
27
Get this data →
Key Numbers
Tracked
791
Active
9
Median list
$250K
Sales (12mo)
27
Get this data →
Key Numbers
Tracked
791
Active
9
Median list
$250K
Sales (12mo)
27
Get this data →
Key Numbers
Tracked
791
Active
9
Median list
$250K
Sales (12mo)
27
Get this data →
Key Numbers
Tracked
791
Active
9
Median list
$250K
Sales (12mo)
27

Inventory breakdown

Distribution of the 9 currently-active listings in ZIP 51003. Full dataset covers 791 properties — listings, off-market homes, rentals, and full history.

Active by price range
Under $300K 5 (62.5%)
$300K–$500K 2 (25%)
$500K–$750K 1 (12.5%)
$750K–$1M 0 (0%)
$1M–$2M 0 (0%)
$2M+ 0 (0%)
Active by bedroom count
Studio/1 bd 0
2 bd 2
3 bd 2
4 bd 2
5+ bd 2
Active by property type
Single Family 9 (100%)
For Developers

Get Alton 51003 data in your app

curl
request 
GET https://api.straply.com/v1/markets/zip/51003
Authorization: Bearer $STRAPLY_KEY
200 OK response 
{
  "zip": "51003",
  "total_tracked": 791,
  "active": 9,
  "median_list": 249900
}
Get an API key Read the docs

ZIP 51003 · Alton, IA real estate: market summary

As of June 2026, Straply tracks 791 homes in ZIP 51003 (Alton, IA), with 9 active for sale at a median list price of $249,900 (~$130/sq ft). Notably, it has notably historic housing — 40% of homes predate 1940.

Median list price
$249,900
Median $/sq ft
$130
Active listings
9
Properties tracked
791

Frequently asked: ZIP 51003 · Alton, IA real estate

What is the median home price in ZIP 51003?

The median list price in ZIP 51003 (Alton, IA) is $249,900 (about $130 per square foot), based on 9 active listings tracked by Straply as of June 2026.

What price range are homes in ZIP 51003?

Active listings in ZIP 51003 (Alton, IA) concentrate in: 62% under $300k and 25% $300k–$500k.

How many homes are for sale in ZIP 51003?

Straply is tracking 9 active listings in ZIP 51003 (Alton, IA) out of 791 properties on record as of June 2026.

How old are the homes in ZIP 51003?

Most homes in ZIP 51003 (Alton, IA) were built in the 1900s. About 33% were built after 1980, while 40% predate 1940. The newest tracked home dates to 2025.

What types of homes are in ZIP 51003?

ZIP 51003 (Alton, IA) is mostly single-family homes (100% of listings).

How many bedrooms do homes in ZIP 51003 typically have?

The most common size in ZIP 51003 (Alton, IA) is 2 bd.

Data as of June 2026. Source: Straply. For address-level history and programmatic access, use the Straply API.