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2129 Roosevelt Avenue

Berkeley

Style

N/A

Zoning

R-2

Year built

1906

Existing

2 buildings

Interior

1,335 sf

Lot size

6,586 sf

Price unavailable

Off market

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.

ADU

Add 1 potential unit to the backyard
$272K-$387K estimated cost

Single-Family or Multi-Family Homes on Separate Lots

Add 1-2 potential units
$350K-$1.1M estimated cost
Loading infill model...

Density level

Density controls will appear after the model finishes loading.

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 ScenarioADU
Estimated Build Cost
$271,802
ADU scenario · 1 new unit · 400 new sf
Build Cost / SF
$
ADU build cost$271,802
100% of project cost
Estimated Added Value (2 Year)
Project value estimate is unavailable for this scenario.
Soft Costs23%
Hard Costs77%
Value bridge and return assumptions will appear when a project value estimate is available.
Cost Breakdown

Unit Economics
Build New Homes
Soft + hard costs
# of new homes
1
Per Home
$272K
# of new sq ft
400
Per Sq Ft
$680
Total
$272K
Financing Estimate
HELOC

Estimate available equity and interest-only payments for funding the build.

HELOC Estimate
Available Equity
Estimated current value
Internal current-value baseline
$0
Max HELOC
80% CLTV minus mortgage balance
$0
Requested HELOC
Capped by available equity
$0
Monthly payment
Interest-only estimate
$0

Timeline

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

Estimated Total Duration

11 months

ADU

Design

Concept design, site planning, and early coordination.

1 month

Month 1

Permitting

Planning review, entitlement approvals, and building permits.

3 months

Month 2 - Month 4

Site Work

Utility coordination, grading, and site preparation.

2 months

Month 5 - Month 6

Construction

Vertical construction through final inspection.

5 months

Month 7 - Month 11

Property Overview

MLS: MLS

Property information from MLS

bridgeMLS © 2026. Information Deemed Reliable but not Guaranteed. This information is being provided by MLS. 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 unavailable.

Location

Data from Type Five
Jurisdiction
Berkeley
Zoning
R-2
Overlay Districts
-
Climate Zone
Zone 3
Transit Access (1/2 mi)
No

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 1
Fire Responsibility
LRA
Wildfire Protection Req.
No