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$5,300,000

For Sale - Active
800 Kalmia Ave, Boulder, CO 80304
4 Beds
6 Baths
3,982 Square Feet
0.47 Acres Lot
Built in 1981
For Sale - Active
Units n/a
Checked: 10 hours ago
Updated: Sep 17, 2025 at 06:30PM

Investment Summary


Monthly Cash Flow
-$21,394
Cap Rate
0.8%
Cash-on-Cash Return
-21.1%
Debt Coverage Ratio
0.15
Internal Rate of Return (5 years)
-16.3%

Property Description


0.47 Acres Lot
Built in 1981
For Sale - Active
Units n/a

Tucked behind mature trees on one of North Boulder's most private streets, 800 Kalmia Avenue sits on a half-acre lot and is a newly transformed modern retreat that blends warmth, precision, and timeless design. Reimagined in 2024, the home showcases refined materials, elevated finishes, and foothill views throughout. A welcoming entry with custom built-ins and hidden storage sets the tone for the craftsmanship inside. At the center, a light-filled great room features wide-plank white oak floors with radiant heat, a paneled fireplace, skylights, and full-height glass doors that open to the outdoors. The chef's kitchen includes a Bluestar range, Thermador refrigeration, a marble-topped island, and unlacquered brass hardware. A walk-through butler's pantry adds prep and storage with an ice maker, beverage drawers, and wine storage. From the kitchen, a Dutch door and sliders connect to the backyard, where curated landscaping, a flat lawn, and foothill views create a private sanctuary. Flexible main-level spaces include a family room with built-ins, a stylish powder room with marble sink, and a guest suite that adjoins a versatile office, music room, or den. Upstairs, a landing leads to three en suite bedrooms. The vaulted primary suite captures southern light and mountain views. Its spa-like bathroom offers a soaking tub, steam shower, dual marble vanity, bidet toilet, and walk-in closet. Two additional bedrooms feature custom details such as Zellige tilework, bespoke vanities, and built-in bunk beds. The newly constructed detached three-car garage doubles as a multifunctional extension with a recreation room, kitchenette, laundry and gear-washing area. A stone patio just off the kitchen is plumbed for an outdoor fireplace, perfect for evenings under the stars. Set in a quiet enclave minutes from North Boulder's trailheads, parks, and shopping, 800 Kalmia Avenue offers refined living with privacy, versatility, and enduring design.

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Location


Property Details


Parking

  • Description: Garage Door Opener
  • Details: Oversized
  • Garage Spaces: 3
  • Spaces Total: 3

Bedroom Information

  • # of Bedrooms: 4

Bathroom Information

  • # of Baths (Full): 2
  • # of Baths (Partial): 1
  • # of Baths (Total): 6.0

Interior Features

  • # of Rooms: 14
  • # of Stories: 2
  • Basement Description: None

Exterior Features

  • Exterior Walls Materials: Fiber cement siding (Hardi-board/Hardi-plank
  • Roof Material: Composition

Land Information

  • Land Use: Residential
  • Land Use Subtype: Residential Parking Garage

Lot Information

  • Parcel ID: 146124117002
  • Lot Size: 20354 sqft

Property Information

  • Property Type: Single Family Residence
  • Year Built: 1981

Tax Information

  • Annual Tax: $14,540

Utilities

  • Water & Sewer: Public
  • Heating: Radiant
  • Cooling: Central Air

Location

  • County: Boulder

Listing Details


Listed by:
The Zach Zeldner Team
Compass - Boulder
(720) 480-7650

Source:
REColorado
MLS#: IR1041862
REColorado

Investment Summary


Monthly Cash Flow
-$21,394
Cap Rate
0.8%
Cash-on-Cash Return
-21.1%
Debt Coverage Ratio
0.15
Internal Rate of Return (5 years)
-16.3%

Purchase Details

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Purchase price:
$5,300,000
Amount financed:
-$4,240,000
Down payment:
$1,060,000
Closing costs:
$159,000
Rehab costs:
$0
Initial cash invested:
$1,219,000
Square feet:
3,982
Cost per square foot:
$1,331
Monthly rent per square foot:
$1.78

Financing Details

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Loan amount:
$4,240,000
Loan to value ratio:
80.0%
Loan type:
Amortizing
Term:
30 years
Interest rate:
5.875%
Principal & interest:
$25,081
Property tax:
$1,212
Insurance:
$497
Private mortgage insurance (PMI):
$0
Monthly payment:
$26,790

Operating Income

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% Rent Monthly Yearly
Gross rent:
$7,100 $85,200
Vacancy loss: (6%)
6% -$426 -$5,112
Operating income:
$6,674 $80,088

Operating Expenses


% Rent Monthly Yearly
Property taxes: (17%)
17%-$1,212-$14,540
Insurance: (7%)
7%-$497-$5,964
Property management: (8%)
8%-$568-$6,816
Repairs & maintenance: (5%)
5%-$355-$4,260
Capital expenditures: (5%)
5%-$355-$4,260
HOA fees: (n/a)
n/an/an/a
Total operating expenses: (42%)
42%-$2,987-$35,840

Cash Flow


Monthly Yearly
Net operating income:
$3,687 $44,244
Mortgage payments:
-$25,081 -$300,972
Cash flow:
-$21,394 -$256,728