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4866 Trinidad AVE

Joaquin Miller · Oakland

4866 Trinidad AVE

Style

Single Family Residence

Zoning

RH-3

Year built

1957

Existing

3 bd · 3 ba

Interior

2,107 sf

Lot size

5,388 sf

$899,000

Unlisted

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
$272K-$273K estimated cost
$183K-$184K future value add

Applicable but Space Constrained: ADU

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 ScenarioSB9
Estimated Project Cost
$1,199,117
SB9 scenario · 1 new unit · 432 new sf
Build Cost / SF
$
SB9 build cost$273,147
23% of project cost
Property acquisition$925,970
77% of project cost
Estimated Project Value (2 Year)
$1,083,323
-9.7% total ROI
-$115,794 potential ROI
Added scenario value$184,323
17% of completed value
Current property value$899,000
83% of completed value
Acquisition77%
Soft Costs7%
Hard Costs16%
Value Projections
Today estimate$899,000
Scenario added sqft$184,323
Completed value$1,083,323
Potential ROI-$115,794
Assumptions
Current value / sf$427
Added sqft432 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
$273K
Per Home
$1.20M
# of original sq ft
2,107
# of new sq ft
432
Total sq ft
2,539
Per Sq Ft
N/A
Per Sq Ft
$632
Per Sq Ft
$472
Total
$926K
Total
$273K
Total
$1.20M
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
$899K
Max HELOC
80% CLTV minus mortgage balance
$180K
Requested HELOC
Capped by available equity
$180K
Monthly payment
Interest-only estimate
$898

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 Cassandra Cruz · Red Oak Realty

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 11, 2026 at 10:39 AM PDT.

Location

Data from Type Five
Jurisdiction
Oakland
Zoning
RH-3
Overlay Districts
S-9 OVERLAY
Climate Zone
Zone 3
Transit Access (1/2 mi)
-

Natural Hazards

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

Fire Risk

Data from Type Five
Fire Hazard Zone
VHFHZ AND S-9 OVERLAY
Fire Responsibility
LRA
Wildfire Protection Req.
-
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