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230 Santa Fe Dr

Rancho San Migue · Walnut Creek

230 Santa Fe Dr

Style

Single Family Residence

Zoning

R-8

Year built

1958

Existing

4 bd · 2 ba

Interior

1,716 sf

Lot size

9,273 sf

$1,689,000

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 potential unit
$390K-$393K estimated cost
$323K-$326K 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
$2,132,175
SB9 scenario · 1 new unit · 783 new sf
Build Cost / SF
$
SB9 build cost$392,505
18% of project cost
Property acquisition$1,739,670
82% of project cost
Estimated Project Value (2 Year)
$2,014,824
$2,104,591 1-year project value ·
-5.5% total ROI
-$117,351 potential ROI
Added scenario value$325,824
16% of completed value
Current property value$1,689,000
84% of completed value
Acquisition82%
Soft Costs4%
Hard Costs14%
Value Projections
Today list price$1,689,000
24-month added value$325,824
24-month project value$2,014,824
Potential ROI-$117,351
Assumptions
Current sale / sf$984
Average sale / sf$677
Annual growth-21.6%
Comp bedrooms4
Comp radius5 miles
Price / sf sourceAverage sold comps
Added sqft783 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
$393K
Per Home
$2.13M
# of original sq ft
1,716
# of new sq ft
783
Total sq ft
2,499
Per Sq Ft
N/A
Per Sq Ft
$501
Per Sq Ft
$853
Total
$1.74M
Total
$393K
Total
$2.13M
Financing Estimate
Construction Loan

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

Construction Estimate
Loan Proceeds
Construction basis
Soft + hard costs
$393K
Loan proceeds
65% loan-to-cost
$255K
Cash required
Unfinanced development cost
$137K
Monthly payment
Interest-only estimate
$2K

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 Dara Buzzard · Dudum Real Estate Group

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 July 9, 2026 at 3:24 PM PDT.

Location

Data from Type Five
Jurisdiction
Walnut Creek
Zoning
R-8
Overlay Districts
None
Climate Zone
Zone 12
Transit Access (1/2 mi)
Yes (Ygnacio Valley Rd and Mendocino Farms)

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 VHFHZ
Fire Responsibility
LRA
Wildfire Protection Req.
No
230 Santa Fe Dr, Walnut Creek Infill Potential — Infillworks