Browse

4120 Webster ST

Temescal · Oakland

4120 Webster ST

Style

Single Family Residence

Zoning

RM-3

Year built

1915

Existing

2 bd · 1 ba

Interior

696 sf

Lot size

2,501 sf

$749,000

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 potential unit to the backyard
$272K-$458K estimated cost
$409K-$1M future value add

Applicable but Space Constrained: Single-Family or Multi-Family Homes on Separate Lots

Loading infill model...

Density level

Density controls will appear after the model finishes loading.

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

Scenario Renders

ADU Maximum Density rendered perspective

ADU

Maximum Density

ADU Minimum Density rendered perspective

ADU

Minimum 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
$1,043,272
ADU scenario · 1 new unit · 400 new sf
Build Cost / SF
$
ADU build cost$271,802
26% of project cost
Property acquisition$771,470
74% of project cost
Estimated Project Value (2 Year)
$1,158,381
$1,128,608 1-year project value ·
11.0% total ROI
$115,109 potential ROI
Added scenario value$409,381
35% of completed value
Current property value$749,000
65% of completed value
Acquisition74%
Soft Costs6%
Hard Costs20%
Value Projections
Today list price$749,000
24-month added value$409,381
24-month project value$1,158,381
Potential ROI$115,109
Assumptions
Current sale / sf$1,076
Average sale / sf$880
Annual growth7.8%
Comp bedrooms2
Comp radius5 miles
Price / sf sourceAverage sold comps
Added sqft400 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
$272K
Per Home
$1.04M
# of original sq ft
696
# of new sq ft
400
Total sq ft
1,096
Per Sq Ft
N/A
Per Sq Ft
$680
Per Sq Ft
$952
Total
$771K
Total
$272K
Total
$1.04M
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 Robert Wilhelm · Compass

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 June 9, 2026 at 8:56 PM PDT.

Location

Data from Type Five
Jurisdiction
Oakland
Zoning
RM-3
Overlay Districts
None
Climate Zone
Zone 3
Transit Access (1/2 mi)
-

Natural Hazards

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

Fire Risk

Data from Type Five
Fire Hazard Zone
NOT IN VHFHZ
Fire Responsibility
LRA
Wildfire Protection Req.
No
View on GoogleView on Zillow