Browse

929 Contra Costa Ave

Thousand Oaks · Berkeley

929 Contra Costa Ave

Style

Single Family Residence

Zoning

R-1H

Year built

1948

Existing

4 bd · 2 ba

Interior

2,104 sf

Lot size

8,213 sf

$1,850,000

For Sale

Development Scenarios

Here's how you can use existing housing laws to add more housing units to this property. For illustrative purposes only, as actual site conditions should be verified in person.

Single-Family Homes and ADUs on Separate Lots

Add 1 potential unit
$322K estimated cost
$462K future value add

Applicable but Space Constrained: ADU

Demolishing the existing structure may create a viable configuration
Loading infill model...

Density level

Density controls will appear after the model finishes loading.

You can demo a structure as long as its vacant / condemned / owner-occupied, has been off the rental market for 5 years, and has no Ellis act evictions in the past 15 years.

Generating the lot configuration for this scenario and density...

Financials

These estimates model the potential development economics for this scenario using local construction costs and comparable sale prices. They're provided for illustrative purposes only and aren't financial advice.

Selected ScenarioSB9
Estimated Project Cost
$2,227,614
SB9 scenario · 1 new unit · 576 new sf
Build Cost / SF
$
SB9 build cost$322,114
14% of project cost
Property acquisition$1,905,500
86% of project cost
Estimated Project Value (2 Year)
$2,312,056
$2,330,361 1-year project value ·
3.8% total ROI
$84,442 potential ROI
Added scenario value$462,056
20% of completed value
Current property value$1,850,000
80% of completed value
Acquisition86%
Soft Costs4%
Hard Costs11%
Value Projections
Today list price$1,850,000
24-month added value$462,056
24-month project value$2,312,056
Potential ROI$84,442
Assumptions
Current sale / sf$908
Average sale / sf$867
Annual growth-3.8%
Comp bedrooms4
Comp radius5 miles
Price / sf sourceAverage sold comps
Added sqft576 sf
Cost Breakdown

Unit Economics
Original Property
Acquisition only
Build New Homes
Soft + hard costs
All-In
Total project
# of original homes
N/A
# of new homes
1
Total homes
1
Per Home
N/A
Per Home
$322K
Per Home
$2.23M
# of original sq ft
2,038
# of new sq ft
576
Total sq ft
2,614
Per Sq Ft
N/A
Per Sq Ft
$559
Per Sq Ft
$852
Total
$1.91M
Total
$322K
Total
$2.23M
Financing Estimate
Construction Loan

Estimate construction proceeds, cash required, and interest-only payments.

Construction Estimate
Loan Proceeds
Construction basis
Soft + hard costs
$322K
Loan proceeds
65% loan-to-cost
$209K
Cash required
Unfinanced development cost
$113K
Monthly payment
Interest-only estimate
$2K

Timeline

Typical project phasing based on the selected scenario, density, and generated development scope.

Estimated Total Duration

15 months

SB9

Design

Concept design, site planning, and early coordination.

2 months

Month 1 - Month 2

Permitting

Planning review, entitlement approvals, and building permits.

4 months

Month 3 - Month 6

Site Work

Utility coordination, grading, and site preparation.

2 months

Month 7 - Month 8

Construction

Vertical construction through final inspection.

7 months

Month 9 - Month 15

Property Overview

MLS: bridgeMLS

Property information from bridgeMLS

Listed by Candice Economides · The Grubb Co. Inc.

bridgeMLS © 2026. Information Deemed Reliable but not Guaranteed. This information is being provided by bridgeMLS. The listings presented here may or may not be listed by the Broker/Agent operating this website. This information is intended for the personal use of consumers and may not be used for any purpose other than to identify prospective properties consumers may be interested in purchasing. Data last updated at September 30, 2026 at 12:49 PM PDT.

Location

Data from Type Five
Jurisdiction
Berkeley
Zoning
R-1H
Overlay Districts
Hillside Overlay
Climate Zone
Zone 3
Transit Access (1/2 mi)
Yes (Solano Av & The Alameda · 0.06 mi)

Natural Hazards

Data from Type Five
Flood Zone
X
Liquefaction Risk
No
Landslide Risk
No
Fault Zone
No

Fire Risk

Data from Type Five
Fire Hazard Zone
Berkeley Fire Zone 2
Fire Responsibility
LRA
Wildfire Protection Req.
Yes