ATTOM’s Property Reports include the ability to find and filter comps—including private sales— based on location, date, price, and and a range of property attributes.
Sign Up NowProperty Report for 3633 21St St, Boulder, CO 80304
Find Comparables
View Map Layers
Subscribe to unlock map layers including flood zones and tax parcels
Property Details
- Property Address 3633 21St St, Boulder, CO 80304
- County Boulder
- Parcel ID 1463-19-1-31-002
- Legal description LOT 1 21ST/LINDEN SUB
- School district Boulder Valley School District Re-2
- Acreage 0.81
- Property class Single Family Residence
- Zoning Subscribe
- Square footage 4,798
- Year built 1987
- Bedrooms 7
- Bathrooms 5
About the Property
3633 21St St is a single family residence in the city of Boulder, CO 80304. Located in the Boulder Valley School District Re-2, which resides in Boulder County, CO and built in 1987. This Single Family Residence sits on a 35,327 sq ft lot and features 7 bedrooms, 5 bathrooms and 4,798 sq ft of living space.
The most recent property tax for 3633 21St St was $29,936 with an estimated market value range of $5,039,706 to $5,570,201. This property was last sold on January 20, 2022 for $4,500,000.
Property Info
Sign up to see full Property Info for 3633 21St St, Boulder
Flood
Legal
- LOT 1 21ST/LINDEN SUB
- Classification SINGLE FAMILY RESIDENCE
- County BOULDER
- FIPS 08013
- Civil Division BOULDER
- Census 080130121.031000
- Parcel ID 1463-19-1-31-002
- Neighborhood 21ST/LINDEN SUB - BO
- Tract 0
- Secondary School District N/A
- Primary School District Boulder Valley School District Re-2
Ownership
Land
- Acres 0.81
- Square Feet 35,327
Building
- Units N/A
- Year Built 1987
- Effective Year Built 2015
- Stories 2
- # Fireplaces N/A
- Garage/Carport 768 sq.ft.
Utilities
- Cooling Evaporative
- Heating Hot Water
Interior
- Square Footage
- Living Area 4,798
- Total Rooms 16
- Bedrooms 7
- Total Bathrooms 5
- Full Bathrooms 3
Your Property Report will also include the following information:
How can you use ATTOM Property Reports?
Real Estate Agents
Power up your client responsiveness, productivity, and transaction speed with the most comprehensive data.
Investors
Make faster decisions based on extensive property information that includes purchasing, selling, listing, and mortgage data.
Appraisers
Comparative market analysis facilitates credible valuations that will move inventory and ease transactions.
Homeowners/buyers
Discover how much your home or prospective home is worth and compare to nearby houses
Try before you buy— examine our free sample report and all the rich data it contains.
Start Free TrialBoulder Residential Market Stats
Median Sale Price
$1,096,011
-14.6% YoY
Median Price/sq ft.
$554
Boulder County Median Sale Price
$1,096,011
-14.6% YoY
See more Real Estate Trends for Boulder including home values, types of properties sold and transaction volumes.
Taxes and Assessments for 3633 21St St, Boulder
| Tax Year | Taxes | Tax Assesed Value | Exemptions |
|---|---|---|---|
| 2024 | $29,936 (+2.8%) | $340,628 (-0.1%) | |
| 2023 | $29,119 (+27%) | $340,876 (+38%) | |
| 2022 | $22,935 (+4.9%) | $246,976 (-4.1%) | |
| 2021 | |||
| 2020 | |||
| 2019 | |||
| 2018 |
Sales History for 3633 21St St, Boulder
The most recent sale on 3633 21St St took place on Jan 14, 2022 and recorded on Jan 20, 2022 for $4,500,000.
Sign up for full access to the complete sales history including potential flips, distressed sales and buyer and seller data.
| Sale Date | Recorded Date | Buyer(s) | Seller(s) | Price | Document ID |
|---|---|---|---|---|---|
Recently Sold Comparables
These are nearby recently sold properties that are similar to this property, base on available data.
| Address | Distance | SqFt | Sale Date | Price | $/SqFt |
|---|---|---|---|---|---|
| 2545 TAMARACK AVE | .82 mi | 4,392 | 08/18/2025 | $2,450,000 | $558 |
| 3132 5TH ST | 1.2 mi | 4,051 | 08/18/2025 | $4,050,000 | $1,000 |
| 1107 JUNIPER AVE | .71 mi | 4,363 | 07/22/2025 | $3,580,000 | $821 |
Our Property Reports contain multiple Automated Valuation Models showing low, median, and high values along with confidence scores.
Sign up to access
Sign up to access
Find the Most Accurate Comparables
Nearby Cities
- 1. Boulder
- 2. Niwot
- 3. Jamestown
- 4. Eldorado Springs
- 5. Lafayette
- 6. Louisville
Various data sets have been provided by a third party or government source and are subject to change and possible errors. Depending on location and source, data may be missing or not available. Information is deemed reliable but not guaranteed to be accurate, up-to-date, or complete. Buyers, investors, and others are responsible for verifying the accuracy of all information.