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4205 West St

Longfellow · Oakland

4205 West St

Style

Single Family Residence

Zoning

RM-2

Year built

1908

Existing

2 bd · 2 ba

Interior

1,387 sf

Lot size

3,481 sf

$795,000

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
$270K estimated cost
$383K future value add

Single-Family or Multi-Family Homes on Separate Lots

Add 1 potential unit
$218K-$435K estimated cost
$191K-$770K future value add
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
$1,088,824
ADU scenario · 1 new unit · 452 new sf
Build Cost / SF
$
ADU build cost$269,974
25% of project cost
Property acquisition$818,850
75% of project cost
Estimated Project Value (2 Year)
$1,177,965
$1,193,847 1-year project value ·
8.2% total ROI
$89,141 potential ROI
Added scenario value$382,965
33% of completed value
Current property value$795,000
67% of completed value
Acquisition75%
Soft Costs6%
Hard Costs19%
Value Projections
Today list price$795,000
24-month added value$382,965
24-month project value$1,177,965
Potential ROI$89,141
Assumptions
Current sale / sf$573
Average sale / sf$919
Annual growth-4.0%
Comp bedrooms2
Comp radius5 miles
Price / sf sourceAverage sold comps
Added sqft452 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
$270K
Per Home
$1.09M
# of original sq ft
1,387
# of new sq ft
452
Total sq ft
1,839
Per Sq Ft
N/A
Per Sq Ft
$597
Per Sq Ft
$592
Total
$819K
Total
$270K
Total
$1.09M
Financing Estimate
Construction Loan

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

Construction Estimate
Loan Proceeds
Construction basis
Soft + hard costs
$270K
Loan proceeds
65% loan-to-cost
$175K
Cash required
Unfinanced development cost
$94K
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 Lauren Kilbourne · Cush Real Estate

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 25, 2026 at 8:08 PM PDT.

Location

Data from Type Five
Jurisdiction
Oakland
Zoning
RM-2
Overlay Districts
None
Climate Zone
Zone 3
Transit Access (1/2 mi)
Yes (40th St & West St)

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
4205 West St, Oakland Infill Potential — Infillworks