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1643 Oxford St

Northside · Berkeley

1643 Oxford St

Style

Triplex

Zoning

R-3

Year built

1912

Existing

9 bd · — ba

Interior

3,152 sf

Lot size

5,720 sf

$1,600,000

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.

ADU

Add 1-2 potential units to the backyard
$272K-$889K estimated cost

Single-Family or Multi-Family Homes on Separate Lots

Add 1-2 potential units
$451K-$1.3M 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 Project Cost
$1,919,802
ADU scenario · 1 new unit · 400 new sf
Build Cost / SF
$
ADU build cost$271,802
14% of project cost
Property acquisition$1,648,000
86% of project cost
Estimated Project Value (2 Year)
Project value estimate is unavailable for this scenario.
Acquisition86%
Soft Costs3%
Hard Costs11%
Value bridge and return assumptions will appear when a project value estimate is available.
Cost Breakdown

Unit Economics
Original Property
Acquisition only
Build New Homes
Soft + hard costs
All-In
Total project
# of original homes
3
# of new homes
1
Total homes
4
Per Home
$549K
Per Home
$272K
Per Home
$480K
# of original sq ft
3,152
# of new sq ft
400
Total sq ft
3,552
Per Sq Ft
$523
Per Sq Ft
$680
Per Sq Ft
$540
Total
$1.65M
Total
$272K
Total
$1.92M
Financing Estimate
Construction Loan

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

Construction Estimate
Loan Proceeds
Construction basis
Soft + hard costs
$272K
Loan proceeds
65% loan-to-cost
$177K
Cash required
Unfinanced development cost
$95K
Monthly payment
Interest-only estimate
$2K

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: bridgeMLS

Property information from bridgeMLS

Listed by Grant Chappell · NAI Northern California

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 August 18, 2026 at 11:37 AM PDT.

Location

Data from Type Five
Jurisdiction
Berkeley
Zoning
R-3
Overlay Districts
None
Climate Zone
Zone 3
Transit Access (1/2 mi)
Yes (Oxford St & Cedar St)

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