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1154 Robles Ct

Happy Valley · Lafayette

1154 Robles Ct

Style

Single Family Residence

Zoning

R-10

Year built

1955

Existing

3 bd · 2 ba

Interior

1,820 sf

Lot size

10,731 sf

$1,750,000

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.

Single-Family Homes and ADUs on Separate Lots

Add 1-2 potential units
$685K-$1.1M estimated cost
$1.1M-$1.9M future value add

Applicable but Space Constrained: ADU

Demolishing the existing structure may create a viable configuration
Loading infill model...

Density level

Density controls will appear after the model finishes loading.

You can demo a structure as long as its vacant / condemned / owner-occupied, has been off the rental market for 5 years, and has no Ellis act evictions in the past 15 years.

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
$2,487,953
SB9 scenario · 1 new unit · 1,568 new sf
Build Cost / SF
$
SB9 build cost$685,453
28% of project cost
Property acquisition$1,802,500
72% of project cost
Estimated Project Value (2 Year)
$2,899,456
$3,018,659 1-year project value ·
16.5% total ROI
$411,504 potential ROI
Added scenario value$1,149,456
40% of completed value
Current property value$1,750,000
60% of completed value
Acquisition72%
Soft Costs5%
Hard Costs23%
Value Projections
Today list price$1,750,000
24-month added value$1,149,456
24-month project value$2,899,456
Potential ROI$411,504
Assumptions
Current sale / sf$962
Average sale / sf$893
Annual growth-9.4%
Comp bedrooms3
Comp radius5 miles
Price / sf sourceAverage sold comps
Added sqft1,568 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
$685K
Per Home
$2.49M
# of original sq ft
1,820
# of new sq ft
1,568
Total sq ft
3,388
Per Sq Ft
N/A
Per Sq Ft
$437
Per Sq Ft
$734
Total
$1.80M
Total
$685K
Total
$2.49M
Financing Estimate
Construction Loan

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

Construction Estimate
Loan Proceeds
Construction basis
Soft + hard costs
$685K
Loan proceeds
65% loan-to-cost
$446K
Cash required
Unfinanced development cost
$240K
Monthly payment
Interest-only estimate
$4K

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 Paddy Kehoe · 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 October 22, 2026 at 9:15 AM PDT.

Location

Data from Type Five
Jurisdiction
Lafayette
Zoning
R-10
Overlay Districts
LAFAYETTE HILLSIDE OVERLAY DISTRICT
Climate Zone
Zone 12
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
Very High Fire Hazard Zone
Fire Responsibility
LRA
Wildfire Protection Req.
Yes