Browse

143 42nd St

Park Plaza · Richmond

143 42nd St

Style

Single Family Residence

Zoning

RL2

Year built

1946

Existing

2 bd · 1 ba

Interior

779 sf

Lot size

3,638 sf

$467,999

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
$242K-$335K estimated cost
$252K-$503K future value add

Single-Family Homes and ADUs on Separate Lots

Add 1 potential unit
$409K estimated cost
$647K 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
$724,247
ADU scenario · 1 new unit · 323 new sf
Build Cost / SF
$
ADU build cost$242,208
33% of project cost
Property acquisition$482,039
67% of project cost
Estimated Project Value (2 Year)
$719,589
$704,107 1-year project value ·
-0.6% total ROI
-$4,658 potential ROI
Added scenario value$251,590
35% of completed value
Current property value$467,999
65% of completed value
Acquisition67%
Soft Costs8%
Hard Costs25%
Value Projections
Today list price$467,999
24-month added value$251,590
24-month project value$719,589
Potential ROI-$4,658
Assumptions
Current sale / sf$601
Average sale / sf$686
Annual growth6.6%
Comp bedrooms2
Comp radius5 miles
Price / sf sourceAverage sold comps
Added sqft323 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
$242K
Per Home
$724K
# of original sq ft
779
# of new sq ft
323
Total sq ft
1,102
Per Sq Ft
N/A
Per Sq Ft
$750
Per Sq Ft
$657
Total
$482K
Total
$242K
Total
$724K
Financing Estimate
Construction Loan

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

Construction Estimate
Loan Proceeds
Construction basis
Soft + hard costs
$242K
Loan proceeds
65% loan-to-cost
$157K
Cash required
Unfinanced development cost
$85K
Monthly payment
Interest-only estimate
$1K

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 Dawn Gulley · eXp Realty of Northern CA, Inc

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 29, 2026 at 8:51 AM PDT.

Location

Data from Type Five
Jurisdiction
Richmond
Zoning
RL2
Overlay Districts
None
Climate Zone
Zone 3
Transit Access (1/2 mi)
Yes (MacDonald Av & 44th 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 A VHFHSV
Fire Responsibility
LRA
Wildfire Protection Req.
No