420 Foster St is a 1,820 square foot multi-family home on a 7,000 square foot lot with 4 bedrooms and 3 bathrooms. Based on Redfin's Tomball data, we estimate the home's value is $295,743.
*Taxable value of land and structures on it ("additions") is determined regularly by local assessors and does not affect market price.
Zoning and permits
Zoning
Permits
D
Duplex (Two-Family) Residential District
The D Duplex Two-Family Residential District is intended to promote stable, quality multiple-occupancy residential development at slightly increased densities. Individual ownership of each side of the duplex two-family units is encouraged, but must meet all platting, building codes and have separate utilities. This district is typically used as a buffer or transition district between lower density residential areas and higher density or nonresidential areas or major thoroughfares.
Permitted uses
Include but are not limited to:
Greenhouse / nursery
Livestock production
Religious facility
Housing-Single unit
Housing-Multiple units
Public service
Educational/school
Golf related
Agriculture-Grove / orchard / vineyard
Park & open space
Aug 24, 2026 • Active
Residential permit applications
HVAC
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
Interior
Bathroom Information
# of Full Baths: 2
# of 1/2 Baths: 2
# of Bathroom Fixtures: 20
Heating & Cooling
Air Conditioning Type: Central
Heating Fuel Type: Gas
Heating Type: Central
Room Information
# of Rooms: 10
Exterior
Exterior Information
Physical Condition: Average
Foundation Type: Slab
Building Style Type: Duplex
Building Construction Quality: Low
Exterior Wall: Frame Concrete Block/Brick
Building Type: Two Family
Property Information
Subdivision Name: CRYSTAL ROCKS
Living Sq. Ft: 1,820
Gross Sq. Ft: 2,348
Adjusted Gross Sq. Ft: 1,930
Ground Floor Sq. Ft: 900
Building Sq. Ft: 2,348
# of Stories: 2
Legal Description: LT 17 CRYSTAL ROCKS
Parking & Garage Information
# of Parking Spaces: 18
Parking Type: Attached Frame Garage
Garage/Parking Sq. Ft: 528
Garage / Carport Type: Attached Frame
Lot Information
# of Buildings: 1
Land Sq. Ft: 7,000
Legal Lot Number: 17
Water District: HARRIS CO FLOOD CNTRL
Municipality Type: 083
Municipality Name: TOMBALL
Acres: 0.1607
County Use Description: RES IMPRVD TABLE VAL
State Use Description: DUPLEX
Location Information
Parcel Location Influence: Primary
Utility Information
Electricity / Wiring Type: Available
Sewer Type: Public
Water Service Type: Public
Financial
Assessor Information
Assessment Year: 2026
Tax District County: HARRIS COUNTY
Public facts
Beds: 4
Baths: 3.0
Sq. Ft.: 1,820
Stories: 2.0
Lot Size: 7,000 square feet
Style: Multi-Family (2-4 Unit)
Year Built: 2002
Year Renovated: 2002
County: Harris County
APN: 1226830000001
Home facts updated by county records on Sep 9, 2026
Around this home
Schools
Tomball Elementary School
Public PreK-4 • Assigned • 1.0mi
8/10
Tomball Junior High School
Public 7-8 • Assigned • 1.3mi
6/10
Tomball High School
Public 9-12 • Assigned • 1.1mi
7/10
Provided by GreatSchools
Lifestyle
Provided by Walk Score and Local Logic
Climate risks
1/10 Flood Factor
Minimal risk of a flood reaching the building in the next 30 years
3/10 Fire Factor
0.15% chance of being in a wildfire in next 30 years
8/10 Heat Factor
7 days above 110° expected this year, 23 days in 30 years
8/10 Wind Factor
99% chance of strong winds in next 30 years
2/10 Air Factor
2 unhealthy days expected this year, 2 days in 30 years
Provided by First Street
Historical weather
Tomball, TX • 77375
Average low and high temperatures (°F)
61
41
72
50
80
58
82
65
87
69
91
76
93
75
93
75
91
70
88
64
78
57
69
50
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Sun exposure
In this area, properties receive around 9.4 hours in
June and 4.8 hours in December, which is comparable to the
U.S. average for solar exposure.
9.4 hrs
4.8 hrs
JuneDecember
Provided by Shadowmap
Estimated sale price
$281,000 – $341,000
Reach more buyers when you sell with Redfin. Save up to $2,957 in fees.3 minutes to get started.
Get a free, detailed breakdown of how we calculated your estimate.
Any estimate of value was prepared using automated processes and should not be considered a comparative market analysis (CMA) or appraisal. You may contact Redfin to provide additional information and analysis for a more accurate estimate of the property's value.