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133 Kingsdale Dr

South Walnut Cr · Walnut Creek

133 Kingsdale Dr

Style

Single Family Residence

Zoning

R-20

Year built

1951

Existing

3 bd · 2 ba

Interior

1,261 sf

Lot size

11,992 sf

$1,300,000

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 1-3 potential units
$824K-$1.4M estimated cost
$1.7M-$3M 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
$2,163,436
SB9 scenario · 1 new unit · 1,718 new sf
Build Cost / SF
$
SB9 build cost$824,436
38% of project cost
Property acquisition$1,339,000
62% of project cost
Estimated Project Value (2 Year)
$2,998,965
$2,883,436 1-year project value ·
38.6% total ROI
$835,529 potential ROI
Added scenario value$1,698,965
57% of completed value
Current property value$1,300,000
43% of completed value
Acquisition62%
Soft Costs6%
Hard Costs32%
Value Projections
Today list price$1,300,000
24-month added value$1,698,965
24-month project value$2,998,965
Potential ROI$835,529
Assumptions
Current sale / sf$1,031
Average sale / sf$859
Annual growth7.3%
Comp bedrooms3
Comp radius5 miles
Price / sf sourceAverage sold comps
Added sqft1,718 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
$824K
Per Home
$2.16M
# of original sq ft
1,261
# of new sq ft
1,718
Total sq ft
2,979
Per Sq Ft
N/A
Per Sq Ft
$480
Per Sq Ft
$726
Total
$1.34M
Total
$824K
Total
$2.16M
Financing Estimate
Construction Loan

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

Construction Estimate
Loan Proceeds
Construction basis
Soft + hard costs
$824K
Loan proceeds
65% loan-to-cost
$536K
Cash required
Unfinanced development cost
$289K
Monthly payment
Interest-only estimate
$5K

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 Renee White · Keller Williams 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 August 26, 2026 at 5:05 PM PDT.

Location

Data from Type Five
Jurisdiction
Unincorporated
Zoning
R-20
Overlay Districts
None
Climate Zone
Zone 12
Transit Access (1/2 mi)
Yes (Palmer Rd and Sylvan Rd)

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 OR WUI (CALFIRE)
Fire Responsibility
LRA
Wildfire Protection Req.
No
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