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1170 Colusa Ave

Northbrae · Berkeley

1170 Colusa Ave

Style

Single Family Residence

Zoning

R-1

Year built

1915

Existing

4 bd · 2 ba

Interior

1,915 sf

Lot size

3,661 sf

$1,545,000

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
$267K-$378K estimated cost
$318K-$637K future value add

Single-Family Homes and ADUs on Separate Lots

Add 1 potential unit
$468K estimated cost
$827K 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
$1,858,156
ADU scenario · 1 new unit · 387 new sf
Build Cost / SF
$
ADU build cost$266,806
14% of project cost
Property acquisition$1,591,350
86% of project cost
Estimated Project Value (2 Year)
$1,863,266
$1,871,029 1-year project value ·
0.3% total ROI
$5,111 potential ROI
Added scenario value$318,266
17% of completed value
Current property value$1,545,000
83% of completed value
Acquisition86%
Soft Costs3%
Hard Costs11%
Value Projections
Today list price$1,545,000
24-month added value$318,266
24-month project value$1,863,266
Potential ROI$5,111
Assumptions
Current sale / sf$1,079
Average sale / sf$863
Annual growth-2.4%
Comp bedrooms4
Comp radius5 miles
Price / sf sourceAverage sold comps
Added sqft387 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
$267K
Per Home
$1.86M
# of original sq ft
1,432
# of new sq ft
387
Total sq ft
1,819
Per Sq Ft
N/A
Per Sq Ft
$689
Per Sq Ft
$1022
Total
$1.59M
Total
$267K
Total
$1.86M
Financing Estimate
Construction Loan

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

Construction Estimate
Loan Proceeds
Construction basis
Soft + hard costs
$267K
Loan proceeds
65% loan-to-cost
$173K
Cash required
Unfinanced development cost
$93K
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 Linda Yu · 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 August 21, 2026 at 8:57 AM PDT.

Location

Data from Type Five
Jurisdiction
Berkeley
Zoning
R-1
Overlay Districts
None
Climate Zone
Zone 3
Transit Access (1/2 mi)
Yes (Hopkins St & Beverly Pl)

Natural Hazards

Data from Type Five
Flood Zone
X
Liquefaction Risk
No
Landslide Risk
No
Fault Zone
No

Fire Risk

Data from Type Five
Fire Hazard Zone
Berkeley Fire Zone 1
Fire Responsibility
LRA
Wildfire Protection Req.
No
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