38$1,425,000
4 bd · 3 ba · 2,938 sqft
109 Costanza Dr, Martinez, CA
Meghan Diehl · Keller Williams Realty · on 2 MLSs
No listing photos
4
Beds
2.5
Baths
2,554
Sqft
1990
Year built
Range $1,114,880 – $1,183,122 · as of August 30, 2026
ATTOM automated valuation model · 54 published estimates over 6.7 years · shaded band is the model's own published low-to-high range
Highest reading $1,219,737 in June 2023; lowest $831,500 in January 2020. The vertical scale starts at the series' own low, not at zero — it is drawn to show movement, not absolute size.
$229,800
Estimated monthly payment
$7,534/mo
Loan amount $919,201. Estimate only — your actual rate and payment depend on credit, location, and lender.
2026 roll
School ratings (A+ to F) from HJN community data.
Morello Park Elementary School
KG-5 · Regular · Martinez Unified School District
496 students · 21.3:1 student–teacher
Las Juntas Elementary School
KG-5 · Regular · Martinez Unified School District
353 students · 19.2:1 student–teacher
Mt. Mckinley
7-12 · Alternative/Other · Contra Costa County Office of Education
42 students · 8.4:1 student–teacher
Hidden Valley Elementary School
KG-5 · Regular · Mount Diablo Unified School District
831 students · 26.6:1 student–teacher
John Muir Elementary School
KG-5 · Regular · Martinez Unified School District
423 students · 20.8:1 student–teacher
Woodbridge Children's Center - John Muir
PK-4 · Regular
27 students · 10.8:1 student–teacher
John Swett Elementary School
KG-5 · Regular · Martinez Unified School District
533 students · 21.9:1 student–teacher
Valhalla Elementary School
KG-5 · Regular · Mount Diablo Unified School District
721 students · 27.7:1 student–teacher
Some properties which appear for sale on this web site may subsequently have sold or may no longer be available.
Contra Costa Association of REALTORSRings at ½ mile and 1 mile. Basemap © OpenMapTiles © OpenStreetMap contributors.
Open the Martinez camera map10 devices mapped within 1 mile of this home: 3 license-plate readers and 7 CCTV cameras; 3 of them identified as Flock Safety devices. None within ½ mile. Nearest: 0.9 mi west. Operator named in the data: The Home Depot.
| Device type | Within ½ mi | Within 1 mi |
|---|---|---|
| License-plate readers | 0 | 3 |
| of which Flock Safety | 0 | 3 |
| CCTV cameras | 0 | 7 |
Community-reported via OpenStreetMap; may be incomplete. Data as of . © OpenStreetMap contributors (ODbL)
License-plate readers (ALPR) are fixed cameras that photograph passing vehicles and read their plates. Records are typically shared with the agency or association that operates the camera.
Flock Safety is a company whose plate-reader cameras are used by police departments, cities, HOAs and businesses. Its devices are usually solar-powered and pole-mounted.
CCTV cameras are fixed video cameras that record a street, building or other area.
Within 2 miles of this home: 32 restaurants and cafés, 2 grocery stores, 25 parks and green spaces, and 14+ transit stops.
Place data from OpenStreetMap.
Baskin-Robbins
Arnold Drive
McDonald's
Arnold Drive
IHOP
Papa Murphy's
Mountain Mike's
Arnold Drive
Togo's
Taco Bell
Arnold Drive
Chipotle
Mexican restaurant · Arnold Drive
Lucky
Nob Hill
Center Avenue
Holiday Highlands Park
Morello School Park
Ladybug Children's Playground
Clean Water Basin
Hidden Valley Park
Martinez Reservoir
Community Garden
Hidden Lake
Morello Avenue & Midhill Road
Morello Avenue & Village Oaks Drive
Morello Avenue & Arnold Drive
Arnold Drive & Holiday Hills Drive
Arnold Drive & Muir Parkway Offices
Arnold Drive & Fig Tree Lane
Pacheco Boulevard & Contra Costa Health Services Discovery House
Pacheco Boulevard & Arthur Road
