OPEN HOUSES HAVE BEEN CANCELED! Nestled in the charming Aspen Knolls subdivision, this delightful ranch-style home offers a perfect blend of comfort and functionality. Amazing Opportunity! The well crafted ADDITION has been permitted as an accessory apartment previously, includes a second full kitchen, dining & living rooms, double door closet and access to a bedroom with en suite bath. This expansive space can be configured for many uses: apartment, in-law or au paire suite or a 2nd family great room with full caterers kitchen off the deck for entertaining. This unique, versatile home is perfectly situated on a lovely fenced-in lot, featuring an expansive Trex deck with pergola, steps down to the pool, hot tub and fire pit. Ideally located in prestigious Aspen Knolls, minutes from the picturesque lakes, woods and trails of Rock Creek Park, minutes from schools, places of worship, Aspen Hill, Olney, Pike & Rose, Rockville Town Center shopping, Metro and major commuter routes. This home has been lovingly cared for and updated; it is turn-key and ready to move in! FEATURES & AMENITIES •3 bedrooms, 2 full baths including an addition suitable as an apartment, in-law, or au pair suite •Welcoming foyer with tile floor and guest coat closet •Sun-filled main level features a living room with easy access via a new sliding glass door to the expansive maintenance-free Trex deck with a pergola and a breezy fan, steps down to the hot tub, pool and beautiful rear gardens; gleaming hardwood floor, and easy flow to the dining room round out the living-dining combo •The spacious eat-in kitchen, featuring a breakfast area and bay window, includes Corian countertops, a glass tile backsplash, solid wood cabinets, stainless steel appliances with gas cooking and ceramic tile flooring. The side door access to the driveway make it easy to bring in groceries and set your keys down on the live-wood shelf near the door •The great room addition with its' own full kitchen, living and dining area with double door closet and access to the deck and rear gardens, pool and hot tub offers the opportunity for an apartment, in-law or au paire suite •Three spacious bedrooms w/ hardwood floors, crown molding and large closets; one bedroom w/ an en suite bath can be configured as a primary suite with access to the great room addition or closed off to provide for an apartment, in-laws, or au pair. •Hall tub and shower bath w/ designer vanity and lighting with ceramic flooring; convenient hall linen closet nearby •Carpeted lower level recreation media room is perfect for entertaining, gaming and relaxing with family and friends •Lower level den/study with carpet and double-door closet could also serve as a playroom •Expansive lower level workshop/storage room runs almost the entire length of the home, plenty of room for both projects and storage •Separate laundry/utility room with new vinyl tile flooring and nearby cedar closet round out the lower level •Special features of this home include an expansive deck and gardens, a pool & hot tub, a newer roof and windows, updated kitchen and baths, a large addition with a living-dining combination and a full kitchen, and a driveway suitable for 6-8 cars. DATES: (2026) French Drain, sump pump, new LL flooring installed, new pool; (2025) new doors installed; (2023) new HWH installed, wood flors refinished in main; (2021) new entry porch, steps & sidewalk; (2019) new windows, vinyl siding and sliding glass door installed; (2016) new roof and hot tub, driveway extended; (2015) new free-standing shed with pull up door; (2009) new HVAC • Turn your key, unpack, and enjoy your new home!
Single-familyProperty Type
1959Year Built
0.27 acresLot Size
$287Price/Sq.Ft.
8 spacesParking
Listed by Molly Carter• Long & Foster Real Estate, Inc.
Est. $2,993 per month, based on comparable rentals
Sale and tax history for 4423 Renn St
Sale History
Tax History
Date
Event
Price
BRIGHT MLS #MDMC2222330
May 19, 2026
Sold
$635,000
$287/sq ft
Apr 17, 2026
Pending
—
Apr 14, 2026
Listed
$625,000
$283/sq ft
Apr 11, 2026
Coming Soon
$625,000
$283/sq ft
Public Records
Nov 13, 1991
Sold
$167,000
$76/sq ft
Year
Property tax
Land + Additions
Assessment*
2025
$5,576 (+10.0%)
2024
$5,071 (+9.6%)
$181,500 + $285,500
$467,000
2023
$4,628 (+16.1%)
2022
$3,987 (+5.0%)
2021
$3,796 (+2.8%)
$181,500 + $177,900
$359,400
2020
$3,694 (+2.8%)
2019
$3,592 (+5.6%)
2018
$3,400 (+3.5%)
2017
$3,284 (+7.0%)
2015
$3,068 (−1.1%)
2014
$3,102 (+1.6%)
$181,600 + $112,900
$294,500
2013
$3,053 (+5.1%)
2012
$2,905 (+226.5%)
2011
$890
2010
$890 (−61.3%)
2009
$2,301
Public record
Public record
Zoning
Permits
Beds
—
Baths
2
Stories
1
Lot width
—
Lot depth
—
Lot size
0.27 Acres
Year renovated
—
Sq. Ft.
2,209
Year built
1959
Style
Single Family Residential
County
Montgomery County
APN
13 01306767
Parking Spaces
—
Basement
—
Accessible
—
HOA Dues
—
Garage
—
Features
—
Last updated by owner on Jul 18, 2026.
R-90
Residential - 90 Zone
The intent of the R-90 zone is to provide designated areas of the County for moderate density residential uses. The predominant use is residential in a detached house. A limited number of other building types may be allowed under the optional method of development.
Permitted uses
Include but are not limited to:
Agriculture-Other
Assembly/ meeting place
Housing-Single unit
Housing-Senior
Infrastructure-Other
Public service
Transportation-Other
Park & open space
Jul 18, 2024 • Final
Electrical
Electrical
Permit history is from public records and may be incomplete or inaccurate. Redfin and its agents make no representations about the property condition or permit status. Buyers should independently verify all information.
Property details
Parking
Parking Information
# of Total Garage and Parking Spaces: 8
Driveway - # of Spaces: 8
Concrete Driveway
Driveway
Interior
Virtual Tour
Bedroom Information
# of Bedrooms On Main Level: 3
Bathroom Information
# of Bathrooms (Full) On Main Level: 2
# of Bathrooms (Full): 2
Interior Information
Appliances: Stainless Steel Appliances, Dishwasher, Stove, Oven/Range - Gas, Refrigerator, Extra Refrigerator/Freezer, Exhaust Fan, Water Heater, Washer, Dryer
Exterior Lighting, Extensive Hardscape, Hot Tub, Sidewalks, Street Lights
Fencing: Partially
Pool Information
Personal Pool
Filtered, Above Ground, Vinyl
Lot Information
Tidal Water: No
Land Information
Land Assessed Value: $181,500
Above Grade Information
Finished Sq.Ft.: 1,659
Finished Sq.Ft. Source: Assessor
Below Grade Information
Unfinished Sq.Ft.: 594
Unfinished Sq.Ft. Source: Assessor
Finished Sq.Ft.: 550
Finished Sq.Ft. Source: Assessor
Financial
Tax Information
County Tax: $5,376
Tax Assessed Value: $470,267
Tax Year: 2025
Tax Annual Amount: $6,268
Assessments Information
Year Assessed: 2026
Utilities
Utilities Information
Cooling Type: Other
Cooling Fuel: Electric
Central, Forced Air
Heating Fuel: Natural Gas
Hot Water: Natural Gas
Sewer Septic: Public Sewer
Water Source: Public
Location
School Information
Elementary School: BROOKHAVEN
Middle Or Junior School: PARKLAND
High School: WHEATON
School District Name: MONTGOMERY COUNTY PUBLIC SCHOOLS
Elementary School Source: 3rd Party
Middle School Source: 3rd Party
High School Source: 3rd Party
School District Source: 3rd Party
Location Information
Outside City Limits
Cross Street: Arctic or Parkland
Directions: Aspen Hill or Bel Pre Rd to Arctic to Renn Street
Road Surface Type: Concrete
Transportation: Bus Stop less than 1 mile, Metro/Subway Station 1 to 3 miles, Airport less than 10 miles, Commuter Lots less than 5 miles
Public facts
Beds: —
Baths: 2.0
Sq. Ft.: 2,209
Stories: 1.0
Lot Size: 0.27 acres
Style: Single Family Residential
Year Built: 1959
Year Renovated: —
County: Montgomery County
APN: 13 01306767
Home facts updated by county records on Jul 18, 2026
Around this home
Schools
Brookhaven Elementary School
Public PreK-5 • Assigned • 0.2mi
7/10
Parkland Middle School
Public 6-8 • Assigned • 0.2mi
7/10
Wheaton High School
Public 9-12 • Assigned • 1.9mi
4/10
Provided by GreatSchools
Climate risks
1/10 Flood Factor
Minimal risk of a flood reaching the building in the next 30 years
1/10 Fire Factor
Unlikely to be in a wildfire in next 30 years
7/10 Heat Factor
7 days above 102° expected this year, 15 days in 30 years
4/10 Wind Factor
16% chance of strong winds in next 30 years
3/10 Air Factor
2 unhealthy days expected this year, 3 days in 30 years
Provided by First Street
Historical weather
Rockville, MD • 20853
Average low and high temperatures (°F)
37
22
43
27
61
39
69
47
73
55
84
64
87
70
80
62
76
59
68
46
57
38
44
28
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Sun exposure
92/ 100
Exceptional sunlight
Sunscore
This home ranks in the top 25% for direct sun exposure in Rockville. There appears to be minimal shading by surrounding buildings, terrain, and vegetation.
9.9 hrs
6.3 hrs
JuneDecember
Provided by Shadowmap
Estimated sale price
$655,000 – $793,000
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