Updated: Apr 25, 2026
Location and Projects
Address
7133 WATSONIA DR, San Ramon, CA, 94582
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Red Square Builders Construction
Serving San Ramon and the surrounding East Bay communities, Red Square Builders brings 25 years of residential construction experience to a range of renovation and remodeling projects. The company’s portfolio includes kitchen and bathroom remodels, home additions, and whole-house renovations designed to meet the individual needs of each homeowner. Red Square Builders works with single-family homes and specializes in guiding clients through all phases of the building process, from initial planning and design to project completion. The team focuses on integrating new construction with existing structures, ensuring functionality and cohesion in every project. Based in San Ramon, Red Square Builders has established a longstanding presence in the area, helping local homeowners update and expand their living spaces.
Red Square Builders Services
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Red Square Builders Contact Information
Phone Number: (925) 525-5482
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Address: 7133 WATSONIA DR, San Ramon, CA 94582
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Red Square Builders San Ramon
Quality
98
84th percentile
Pro tip:
We generally recommend hiring a contractor with a score higher than 95.
Red Square Builders has a BuildZoom score of 98, which places them above 84% of 336,931 contractors in California.
Activity
|
1 project
|
2025 |
|
1 project
|
2023 |
Our building permit records indicate that Red Square Builders has worked on at least
2.0 projects over the past 3 years.
This is an overview of this contractor's activity. Click here to access our complete licensing and building permit database.
This is an overview of this contractor's activity. Click here to access our complete licensing and building permit database.
Pricing
|
1 project
|
$5k-$20k |
Pro tip:
For more details about their pricing, check out their recent activity to see how much they have charged for different types of work.
This is a sample of this contractor's permits. Click here to access their complete permit history.
Construction of new 1 200 s.f. adu **per title 24 1.67kwdc photovoltaic system required. separate permit and plans required. hold final for photovoltaic permit and installation. **
Valuation:
N/A
Permit #:
BIR23-002186
Status:
expired
Fee:
$5,581
Permit Type:
N/A
Building Type:
N/A
Residence bldg; rebuild existing retaining wall @ driveway
Valuation:
$10,000
Permit #:
B2023-0573
Status:
issued
Fee:
$981
Permit Type:
Retaining wall an...
Building Type:
N/A
424 sq ft addition with kitchen and bathroom remodel and replacing all windows. per plans
Valuation:
N/A
Permit #:
BIAD18-008103
Status:
final
Fee:
$3,669
Permit Type:
N/A
Building Type:
N/A
Remove portion of existing garage to enlarge guest bedroom: construct new walls raise garage slab new walk in closet 2 new windows and reconfigure bathroom (elec/mech/plumbing/bldg)
Valuation:
$38,000
Permit #:
CB15-0357
Status:
final
Fee:
$2,440
Permit Type:
N/A
Building Type:
N/A
Replace kitchen cabinets, install 2 gfci electrical circuits for small appliances, circuit for microhood , dedicated circuit for refrigerator, 220v 40a for electric range, insulate kitchen exterior wall w/ r-19 insulation, & re-frame a portion of a wall that contained a pocket door leading to the hallway (pocket door has been removed)
pre-permit inspection (on 5/17/12) in response... see more
Valuation:
$12,000
Permit #:
BP12001162
Status:
final
Fee:
$1,325
Permit Type:
N/A
Building Type:
N/A
Complete re1601009 electrical for total house remodel. ds14-364
Valuation:
N/A
Permit #:
RE1603788
Status:
FINAL
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Complete re1601009 electrical for total house remodel. ds14-364
Valuation:
N/A
Permit #:
RE1603788
Status:
final
Fee:
$207
Permit Type:
N/A
Building Type:
N/A
Remodel master bathroom closet w/pe
Valuation:
$25,144
Permit #:
B18-012678
Status:
final
Fee:
$1,171
Permit Type:
N/A
Building Type:
N/A
Rem kit/replace 3 vanities/new lighting in master bathroom only w/pem *stop wk
Valuation:
$16,000
Permit #:
B14-009254
Status:
ISSUED
Fee:
$1,519
Permit Type:
N/A
Building Type:
N/A
Electrical related to non-structural bathroom remodel. unit 320
Valuation:
N/A
Permit #:
E1603458
Status:
final
Fee:
$207
Permit Type:
N/A
Building Type:
N/A
(b) - building alteration - 3+ residential units or commercial (building)
2017-02-06
Non-structural bathroom remodel to include new tile. no other changes to wall layout or footprint. unit 320
Valuation:
$16,000
Permit #:
B1604520
Status:
final
Fee:
$807
Permit Type:
N/A
Building Type:
N/A
Plumbing related to non-structural bathroom remodel. unit 320
Valuation:
N/A
Permit #:
P1602626
Status:
final
Fee:
$310
Permit Type:
N/A
Building Type:
N/A
Building new construction additions alterations or sign
2012-10-10
Water/fire damage repair
Valuation:
$45,000
Permit #:
B121402
Status:
final
Fee:
$3,864
Permit Type:
Ralt
Building Type:
N/A
New single story single family residence w/attaached garage
Valuation:
N/A
Permit #:
BI316877
Status:
final
Fee:
$18,033
Permit Type:
N/A
Building Type:
N/A
Permit value$70k kitchen/2bath remodel
Valuation:
N/A
Permit #:
B12-1816
Status:
ISSUED
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Legalize relocated furnace
Valuation:
$2,000
Permit #:
BP12001570
Status:
final
Fee:
$127
Permit Type:
N/A
Building Type:
N/A
New retaining wall appromitely 250 sq ft 5 to 6 ft height
Valuation:
N/A
Permit #:
BI335381
Status:
final
Fee:
$230
Permit Type:
N/A
Building Type:
N/A
No Description Available
Valuation:
N/A
Permit #:
132755
Status:
final
Fee:
N/A
Permit Type:
Single family
Building Type:
N/A
Drainage installation for new single family residence
Valuation:
$7,500
Permit #:
BI317832
Status:
final
Fee:
$375
Permit Type:
N/A
Building Type:
N/A
Building new construction additions alterations or sign
2015-12-15
Bathroom remodel
Valuation:
$11,000
Permit #:
B152201
Status:
final
Fee:
$1,021
Permit Type:
Ralt
Building Type:
N/A
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Red Square Builders License info
Verified License
| License # | 963110 |
| Status | Active |
| State | California |
| Type | General Building |
| Business Type | Sole Ownership |
- BuildZoom verified this license was active as of April 2026.
Verify this license's status for Red Square Builders at the California Contractors State License Board.
This is a sample of licensing data; click here to access a complete history.
98
BuildZoom Score
Bonded
| Bonded Agent | Western Surety Company |
| Bond Value | $15,000 |
Insured
| Workers Comp Provider | Norguard Insurance Company |
15
Permits
- Building permit records show that Red Square Builders has worked on 15 permitted projects.
Red Square Builders Employees
AB
Alex Blumin
Sole Owner
AB
Alexander Blumin
Owner