Updated: May 21, 2026
Location and Projects
Address
2544 CORTE DEL MARQUES, Walnut Creek, CA, 94598
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California Custom Sunrooms Construction
Serving homeowners throughout Walnut Creek and the broader Contra Costa County area, California Custom Sunrooms specializes in the design and construction of custom sunrooms. With 34 years of experience, the company focuses on building sunroom additions that are tailored to each property’s unique layout and the client’s preferences. Their portfolio includes glass-enclosed patio rooms, studio sunrooms, and conservatory-style additions, designed to integrate seamlessly with existing residential architecture. The team manages the construction process from initial consultation and design to permitting and project completion. California Custom Sunrooms emphasizes the use of materials suited to California’s climate, including energy-efficient windows and durable framing systems. The company works exclusively with residential clients, providing solutions that maximize natural light and expand year-round living space.
California Custom Sunrooms Services
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California Custom Sunrooms Contact Information
Phone Number: (626) 825-2786
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Address: 2544 CORTE DEL MARQUES, Walnut Creek, CA 94598
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California Custom Sunrooms Walnut Creek
Quality
111
96th percentile
Pro tip:
We generally recommend hiring a contractor with a score higher than 95.
California Custom Sunrooms has a BuildZoom score of 111, which places them above 96% of 336,931 contractors in California.
Activity
|
62 projects
|
2025 |
|
95 projects
|
2024 |
|
90 projects
|
2023 |
Our building permit records indicate that California Custom Sunrooms has worked on at least
247.0 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.
Experience
|
92 projects
|
Home Additions |
|
29 projects
|
New Constructions |
Analyzing permits over the last 4 years shows that California Custom Sunrooms mostly works on
home addition
and new construction
projects.
Pricing
|
9 projects
|
< $5k |
|
73 projects
|
$5k-$20k |
|
93 projects
|
$20k-$50k |
|
28 projects
|
$50k-$100k |
|
4 projects
|
$100k-$250k |
The typical size of their permits is approximately $24,700. This graph shows the distribution of these job values.
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.
Building Permits by California Custom Sunrooms
This is a sample of this contractor's permits. Click here to access their complete permit history.
Replace damaged non conditioned patio enclosure with new to replace a damaged permitted non conditioned patio enclosure (250sq/ft) with a like for like new non conditioned patio enclosure (250sq/ft) at the rear of the home onto the existing 5 concrete slab
Valuation:
N/A
Permit #:
B25-00717
Status:
final
Fee:
$1,901
Permit Type:
Alteration/renova...
Building Type:
N/A
Attached enclosed patio room -non conditioned approx 320sqft a new concrete slab foundation. new (4) ggi and gfi afi protected electrical outlets (6) led ceiling lights (2) switches porch light with motion sensor
Valuation:
$60,400
Permit #:
B25-0570
Status:
final
Fee:
$2,689
Permit Type:
N/A
Building Type:
N/A
Install 13x25 attached aluminum patio cover on existing concrete slab. no electrical. carbon monoxide & smoke alarms required. reference crc sections r315 & r314. all work subject to field inspection
Valuation:
$5,160
Permit #:
RES-2509744
Status:
final
Fee:
$296
Permit Type:
N/A
Building Type:
N/A
Residential: full review - additions adu accessory structures pools remodel demolish generators and
2025-06-30
New attached patio enclosure (sunroom) on existing wood deck w electrical 224 sq ft lights receptacles fan & switch addition blocking and brackets to existing deck for reinforcment
Valuation:
$42,280
Permit #:
BLD25-02298
Status:
complete
Fee:
$646
Permit Type:
Accessory
Building Type:
N/A
New building addition adu (not a garage conversion) deck patio cover garage barn ground mount solar
2025-03-28
(n) 696 sq ft attached 2nd story water proof deck w rails. (n) 235 sq ft attached patio enclosure on proposed deck w electrical. (n) 500 sq ft attached patio enclosure under proposed deck w electrical. (n) 813 sq ft concrete slab on grade w footings as per plan
Valuation:
$121,800
Permit #:
CBNR2024-00612
Status:
final
Fee:
$2,712
Permit Type:
N/A
Building Type:
N/A
To construct 323 s.f. unconditioned patio enclosure to rear of residence. install electrical outlets switches and lights
Valuation:
$88,300
Permit #:
BLD2026-01070
Status:
issued
Fee:
$3,814
Permit Type:
Patio cover/enclo...
Building Type:
N/A
(n) 245 sq ft attached patio enclosure on existing concrete slab w electrical: receptacles fan lights and switches
Valuation:
$118,925
Permit #:
BD-2025-298476
Status:
issued
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
New building addition adu (not a garage conversion) deck patio cover garage barn ground mount solar
2024-07-29
84 sq ft attached aluminum patio cover on proposed footings. 84 sq ft floating trex deck under patio cover on proposed footings w steps and landings. 224 sq ft attached aluminum patio enclosure on proposed concrete slab foundation w landing & electrical: fan receptacles light and switch
Valuation:
$45,500
Permit #:
CBNR2024-00205
Status:
complete
Fee:
$1,114
Permit Type:
N/A
Building Type:
N/A
Epc - (n) aluminum patio enclosure under existing roof: 68 sq. ft. w electrical: light (n) attached aluminum patio enclosure: 160 sq ft w electrical: receptacle fan and switch (n) attached aluminum cover extension: 143 sq ft w electrical: fan & light all structures on existing concrete slab r/r - two (e) 3'-0"x4'11 windows and replace with (n) 6'x6'-8 french door
Valuation:
$35,000
Permit #:
RES-2405597
Status:
final
Fee:
$1,718
Permit Type:
N/A
Building Type:
N/A
To provide and install a new non conditioned patio enclosure (378sq/ft) at the rear of the home onto a new concrete slab foundation
Valuation:
$62,500
Permit #:
BLD2025-05734
Status:
complete
Fee:
$3,152
Permit Type:
Patio cover/enclo...
Building Type:
N/A
To provide and install a new attached non-conditioned patio enclosure (374 sq/ft) at the rear of the home onto a new concrete slab foundation with electrical. replace (e) dining room sliding window with new sliding door
Valuation:
$62,700
Permit #:
B25-2831
Status:
approved
Fee:
$3,248
Permit Type:
N/A
Building Type:
N/A
(n) 240 sq ft attached aluminum patio enclosure on existing deck w electrical: fan ceiling lights and switch. [permit after the fact] 125 sq ft free-standing wood pergola on existing footings
Valuation:
$70,005
Permit #:
BD-2024-294871
Status:
final
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Building accessory structure - accessory building shed greenhouse
2023-12-12
Patio cover a: 100 sq ft attached aluminum patio cover on existing concrete slab no electrical. - patio cover b: 100 sq ft attached aluminum patio cover n existing concrete slab no electrical. patio enclosure: 200 sq ft attached aluminum patio enclosure on existing concrete slab w electrical: fan eceptacles lights and switch total: 400 sq ft
Valuation:
$41,557
Permit #:
BLDA-23-0148
Status:
complete
Fee:
$595
Permit Type:
N/A
Building Type:
N/A
552 sq ft attached aluminum patio cover on footings w electrical: fan lights and receptacle outlets. water conserving fixtures are required to be installed throughout this structure per sb 407 (note: residences built after january 1 1994 are exempt). carbon monoxide & smoke alarms required. reference 2022 crc sections r315 & r314. all work subject to field inspection
Valuation:
$41,127
Permit #:
RES-2310574
Status:
final
Fee:
$403
Permit Type:
N/A
Building Type:
N/A
Scope of work to include: (n) 262 sq ft attached aluminum patio enclosure on existing concrete slab w electrical: fan receptacles lights and switch
Valuation:
$16,818
Permit #:
2024 118628 RS
Status:
final
Fee:
$1,206
Permit Type:
Single-family
Building Type:
N/A
To provide and install a new non conditioned patio enclosure wall system (368sq/ft) at the rear of the house onto new concrete foundation. lot size 17 859 (e) home 1st floor 3 160 (e)garage 800 (n) patio room 368. first floor new total coverage 4 328 17 859 = 24% lot coverage
Valuation:
N/A
Permit #:
BISUB23-00579
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Residential: full review - additions adu accessory structures pools remodel demolish generators and
2024-11-26
Deck addition 620 sq ft *orig deck 24 sq ft on 102973* remove and replace existing wood deck with new deck: 620 sq ft new patio enclosure on top of deck: 220 sq ft w electrical new cover on top of deck: 253 sq ft w electrical: fan wui sra very high placer hills fire protection district _______________________________________________________________________ rev 1 3/3/25 abf revise ledg... see more
Valuation:
$28,892
Permit #:
BLD24-05909
Status:
issued
Fee:
$240
Permit Type:
Accessory
Building Type:
N/A
415 sq ft attached aluminum pergola on proposed pier footings no electrical 80 sq ft attached aluminum pergola on proposed pier footings no electrical. all work is subject to field inspection. carbon monoxide & smoke alarms required. reference crc sections r315 & r314. water conserving fixtures are required to be installed throughout this residence per sb 407 (note: residences built a... see more
Valuation:
$15,000
Permit #:
RES-2306063
Status:
final
Fee:
$318
Permit Type:
N/A
Building Type:
N/A
308 sq ft attached aluminum patio cover on existing concrete slab w electrical: fans & receptacle outlets. water conserving fixtures are required to be installed throughout this structure per sb 407 (note: residences built after january 1 1994 are exempt). carbon monoxide & smoke alarms required. reference 2022 crc sections r315 & r314. all work subject to field inspection
Valuation:
$11,900
Permit #:
RES-2312451
Status:
final
Fee:
$309
Permit Type:
N/A
Building Type:
N/A
154 sq ft attached patio cover on existing concrete slap w/electrical: fan. carbon monoxide & smoke alarms required. reference crc sections r315 & r314. all work subject to field inspection water conserving fixtures are required to be installed throughout this residence per sb 407 (note: residences built after january 1 1994 are exempt)
Valuation:
$4,900
Permit #:
RES-2307479
Status:
final
Fee:
$287
Permit Type:
N/A
Building Type:
N/A
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California Custom Sunrooms License info
Verified License
| License # | 636491 |
| Status | Active |
| State | California |
| Type | General Building |
| Business Type | Sole Ownership |
- BuildZoom verified this license was active as of March 2026.
Verify this license's status for California Custom Sunrooms at the California Contractors State License Board.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | 638623 |
| Status | Inactive |
| State | California |
| Type | General Building |
| Business Type | Sole Ownership |
- According to the California Contractors State License Board, the status of this license was at one point cancelled. However, this information may have changed. If this is your business, please update your license status.
Check this license's status for California Custom Sunrooms at the California Contractors State License Board.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | 746552 |
| Status | Inactive |
| State | California |
| Type | General Building |
| Business Type | Sole Ownership |
- According to the California Contractors State License Board, the status of this license was at one point cancelled. However, this information may have changed. If this is your business, please update your license status.
Check this license's status for California Custom Sunrooms at the California Contractors State License Board.
This is a sample of licensing data; click here to access a complete history.
111
BuildZoom Score
Bonded
| Bonded Agent | American Contractors Indemnity Company |
| Bond Value | $15,000 |
Insured
| Workers Comp Provider | State Compensation Insurance Fund |
2.6K
Permits
- Building permit records show that California Custom Sunrooms has worked on 2585 permitted projects.
California Custom Sunrooms Employees
EW
Edward Jay Wilbur
General Partner
GS
Glenn Alfred Skidmore
Sole Owner
SC
Steven Jay Clairmont
Qualify Partner