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$13,000,000

For Sale - Active
3621 21st St, Boulder, CO 80304
4 Beds
5 Baths
6,300 Square Feet
0.66 Acres Lot
Built in 2021
For Sale - Active
Units n/a
Checked: 20 hours ago
Updated: May 27, 2025 at 04:41PM

Investment Summary


Monthly Cash Flow
-$60,013
Cap Rate
0.1%
Cash-on-Cash Return
-24.1%
Debt Coverage Ratio
0.02
Internal Rate of Return (5 years)
-19.2%

Property Description


0.66 Acres Lot
Built in 2021
For Sale - Active
Units n/a

Meticulously crafted, masterfully built, and expertly curated with an elevated design, this custom home is a true masterpiece, perfectly situated on a premier lot in the exclusive Carolyn Heights neighborhood, The exquisite design and inspiring architecture of this exceptional residence ensures that every facet embodies luxury, casual elegance, and attention to detail, harmoniously blending wood, glass, stone, and steel to create an ambiance that is both inviting and inspiring. Upon entry, you'll be greeted by soaring ceilings, wide plank white oak flooring, & an open-concept main level bathed in abundant natural light streaming through expansive windows, inviting the outside in. The prodigious living area seamlessly integrates indoor & outdoor spaces, offering a glimpse of the splendid living experience that awaits. The architectural grandeur is showcased w/ a dramatic three-story open-tread wooden staircase, custom steel railings, & illuminated by bespoke lighting. The centerpiece of the home, the gourmet kitchen, boasts an impressive center island, marble & quartz countertops, artisanal tile, custom cabinetry, top-tier chef's appliances, & walk-in pantry. The elegant main floor primary bedroom suite is a tranquil retreat, w/ wall-to-wall windows, a generous walk-in closet w/custom cabinetry. The soothing primary bathroom features premium quality finishes, including designer tile, custom cabinetry, & alluring lighting.The heated pool w/ a tanning shelf, natural stone deck, & automatic pool cover takes center stage in the serene yard. Every aspect of this smart home seamlessly integrates technology, design, & automation to ensure security & convenience, and efficiency. For the discerning owner desiring a residence that embodies casual elegance & architectural interest, w/proximity to vibrant downtown Boulder & nestled in an upscale neighborhood, this property is a rare find that offers an unsurpassed lifestyle.

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Location


Property Details


Parking

  • Description: Heated Garage, Oversized
  • Details: Heated Garage, Oversized, Attached
  • Garage Spaces: 3
  • Spaces Total: 3

Bedroom Information

  • # of Bedrooms: 4

Bathroom Information

  • # of Baths (Full): 1
  • # of Baths (Partial): 1
  • # of Baths (Total): 5.0

Interior Features

  • # of Rooms: 15
  • Basement: Yes
  • Basement Description: Full

Exterior Features

  • Exterior Walls Materials: Marble
  • Roof Material: Composition
  • Pool: Yes

Land Information

  • Land Use: Residential
  • Land Use Subtype: Single Family Residential

Lot Information

  • Parcel ID: 146319107005
  • Lot Size: 28700 sqft

Property Information

  • Property Type: Single Family Residence
  • Style: Contemporary
  • Year Built: 2021

Tax Information

  • Annual Tax: $54,784

Utilities

  • Water & Sewer: Public
  • Heating: Baseboard, Forced Air, Hot Water, Radiant
  • Cooling: Central Air

Location

  • County: Boulder

Listing Details


Listed by:
Patricia Dessel
Compass - Boulder
(303) 475-6097

Source:
REColorado
MLS#: IR1025368
REColorado

Investment Summary


Monthly Cash Flow
-$60,013
Cap Rate
0.1%
Cash-on-Cash Return
-24.1%
Debt Coverage Ratio
0.02
Internal Rate of Return (5 years)
-19.2%

Purchase Details

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Purchase price:
$13,000,000
Amount financed:
-$10,400,000
Down payment:
$2,600,000
Closing costs:
$390,000
Rehab costs:
$0
Initial cash invested:
$2,990,000
Square feet:
6,300
Cost per square foot:
$2,063
Monthly rent per square foot:
$1.40

Financing Details

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Loan amount:
$10,400,000
Loan to value ratio:
80.0%
Loan type:
Amortizing
Term:
30 years
Interest rate:
5.875%
Principal & interest:
$61,520
Property tax:
$4,565
Insurance:
$616
Private mortgage insurance (PMI):
$0
Monthly payment:
$66,701

Operating Income

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% Rent Monthly Yearly
Gross rent:
$8,800 $105,600
Vacancy loss: (6%)
6% -$528 -$6,336
Operating income:
$8,272 $99,264

Operating Expenses


% Rent Monthly Yearly
Property taxes: (52%)
52%-$4,565-$54,784
Insurance: (7%)
7%-$616-$7,392
Property management: (8%)
8%-$704-$8,448
Repairs & maintenance: (5%)
5%-$440-$5,280
Capital expenditures: (5%)
5%-$440-$5,280
HOA fees: (n/a)
n/an/an/a
Total operating expenses: (77%)
77%-$6,765-$81,184

Cash Flow


Monthly Yearly
Net operating income:
$1,507 $18,084
Mortgage payments:
-$61,520 -$738,240
Cash flow:
$60,013 $720,156