1
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421 Mapleton Ave #A
About This Property
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Cap Rate Calculator
What does this mean?
Based on our analysis, the cap rate of this property is 1.25%. A negative cap rate indicates that the property might not be feasible as an income-producing asset. The median cap rate for a near zip code 11238 is 4.23%.
How much can I actually make?
Actual monthly rental income may vary between $4,760 and $7,140 depending on unit-specific characteristics. You can change the amount using the slider to further explore.
How is cap rate calculated?
Cap Rate = Net Operating Income (NOI) / Property Asset Value.
When calculating the cap rate, we assume 100% occupancy. Leverage (mortgage) is not considered.
Cap Rate provided by RealtyHop and RentHop, learn more about cap rate here.
Price History
| Date / Event | Date | Event | Price |
|---|---|---|---|
| Jul 24, 2026 | Listed | $727,000 | |
| Listed | |||
| Apr 18, 2024 | Sold | ||
| Sold | |||
| Oct 6, 2023 | Listed by Compass - Boulder | $699,000 | |
| Listed by Compass - Boulder | |||
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HUGE Price Improvement on this PERFECTLY LOCATED property in West Boulder! This Mapleton Hill historic gem sits only two blocks from Mt. Sanitas & just a few blocks to Downtown. The inside has a flowing floor plan with high ceilings, brick accent walls, built-in book shelves & wood floors throughout. A modern kitchen features Sub Zero & Bosch appliances as well as stainless steel countertops & a dining area. The bedroom is very spacious & overlooks the park-like patio area & grounds. Building roof is less then 2 years old and the garage roof is less then 3 years old. Newer gas stove & garbage disposal. Super well maintained unit with utility bills averaging only $30-$40 per Month! This elegantly historic property is a true rarity sitting in an ideal location. HOA does not allow short term rentals. Pet friendly HOA. Additional off-street parking on both sides of the garage AND alley access! The HOA shows 775 SQ. FT.
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Property Highlights
Comparables
Status
Price/ft²
Listed On
Sold On
Past Sales
| Date | Unit | Beds | Baths | Sqft | Price | Closed | Listed By |
|---|---|---|---|---|---|---|---|
|
07/24/2026
|
1 Bed
|
1 Bath
|
618 ft²
|
$727,000
1 Bed
1 Bath
618 ft²
|
$727,000
07/24/2026
|
John Kinney
Homestead Real Estate, LLC
| |
|
10/06/2023
|
1 Bed
|
1 Bath
|
618 ft²
|
$699,000
1 Bed
1 Bath
618 ft²
|
$605,000
-13.45%
04/18/2024
|
Boulos Ayad
Compass - Boulder
| |
|
10/09/2013
|
1 Bed
|
1 Bath
|
616 ft²
|
$425,000
1 Bed
1 Bath
616 ft²
|
$425,000
10/09/2013
|
Dave Naber
RE/MAX Alliance on Walnut
|
Building Info
Phone: 425-283-2930
Address: 335 Madison Avenue, New York, NY 10017