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939 Mountain View Dr

Downtown Laf · Lafayette

939 Mountain View Dr

Style

Single Family Residence

Zoning

MRT

Year built

1942

Existing

3 bd · 2 ba

Interior

1,698 sf

Lot size

4,882 sf

$1,195,000

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.

ADU

Add 1 potential unit to the backyard
$272K-$562K estimated cost
$244K-$807K future value add

Single-Family or Multi-Family Homes on Separate Lots

Some density options may be space constrained
Add 1 potential unit
$728K estimated cost
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
$1,502,652
ADU scenario · 1 new unit · 400 new sf
Build Cost / SF
$
ADU build cost$271,802
18% of project cost
Property acquisition$1,230,850
82% of project cost
Estimated Project Value (2 Year)
$1,439,306
$1,490,739 1-year project value ·
-4.2% total ROI
-$63,346 potential ROI
Added scenario value$244,306
17% of completed value
Current property value$1,195,000
83% of completed value
Acquisition82%
Soft Costs4%
Hard Costs14%
Value Projections
Today list price$1,195,000
24-month added value$244,306
24-month project value$1,439,306
Potential ROI-$63,346
Assumptions
Current sale / sf$704
Average sale / sf$895
Annual growth-17.4%
Comp bedrooms3
Comp radius5 miles
Price / sf sourceAverage sold comps
Added sqft400 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
$272K
Per Home
$1.50M
# of original sq ft
1,698
# of new sq ft
400
Total sq ft
2,098
Per Sq Ft
N/A
Per Sq Ft
$680
Per Sq Ft
$716
Total
$1.23M
Total
$272K
Total
$1.50M
Financing Estimate
Construction Loan

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

Construction Estimate
Loan Proceeds
Construction basis
Soft + hard costs
$272K
Loan proceeds
65% loan-to-cost
$177K
Cash required
Unfinanced development cost
$95K
Monthly payment
Interest-only estimate
$2K

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 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 September 18, 2026 at 2:09 PM PDT.

Location

Data from Type Five
Jurisdiction
Lafayette
Zoning
MRT
Overlay Districts
-
Climate Zone
Zone 12
Transit Access (1/2 mi)
Yes (Mt Diablo Blvd and Mountain View Dr · 0.17 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
NOT IN VHFHZ
Fire Responsibility
LRA
Wildfire Protection Req.
No
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