Updated: Feb 18, 2026
Location and Projects
Address
21017 HILLSIDE DRIVE, Topanga, CA, 90290
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Sound Structures Construction
Based in Topanga, CA, Sound Structures specializes in custom residential construction and remodeling throughout Los Angeles County. The company undertakes a range of project types, including new home construction, additions, and extensive remodels. Portfolio examples highlight hillside builds, contemporary architectural designs, and energy-efficient structures. Sound Structures serves homeowners in neighborhoods such as Topanga, Malibu, Pacific Palisades, and Santa Monica, working on both single-family homes and complex sites with challenging terrain. With 13 years in business, the firm emphasizes the use of sustainable building materials and modern construction techniques. Sound Structures collaborates closely with architects and engineers to address site-specific requirements, focusing on structural integrity and efficient project management for each custom build or renovation.
Sound Structures Services
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Sound Structures Contact Information
Phone Number: (415) 308-2098
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Address: 21017 HILLSIDE DRIVE, Topanga, CA 90290
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Sound Structures Topanga
Quality
102
89th percentile
Pro tip:
We generally recommend hiring a contractor with a score higher than 95.
Sound Structures has a BuildZoom score of 102, which places them above 89% of 336,931 contractors in California.
Activity
|
1 project
|
2025 |
|
2 projects
|
2024 |
|
3 projects
|
2023 |
Our building permit records indicate that Sound Structures has worked on at least
6.0 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
|
2 projects
|
< $5k |
|
1 project
|
$20k-$50k |
|
1 project
|
$50k-$100k |
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.
Supplemental permit for 21010-20000-01021 to capture new modification for building separation for updated justification stating (e) single family dwelling is fully sprinklered & exterior wall of recreation room is one-hour fire rated
Valuation:
$501
Permit #:
21010-20001-01021
Status:
final
Fee:
N/A
Permit Type:
1 or 2 family dwe...
Building Type:
N/A
Eplan new addition to (e) 1-story single family dwelling
Valuation:
$100,000
Permit #:
24014-10000-03524
Status:
final
Fee:
N/A
Permit Type:
1 or 2 family dwe...
Building Type:
N/A
Water damage termite damage dry rot repair less than 10% of replacement cost of residential buildings
Valuation:
$501
Permit #:
24016-10000-13972
Status:
final
Fee:
N/A
Permit Type:
1 or 2 family dwe...
Building Type:
N/A
(n) 1-story detached recreation room (irr 21'-4 x 15'- 9 1/2")
Valuation:
$40,000
Permit #:
21010-20000-01021
Status:
final
Fee:
N/A
Permit Type:
1 or 2 family dwe...
Building Type:
N/A
1 bathroom(s).bathroom remodel for residential buildings (no structural changes)
Valuation:
$5,000
Permit #:
24016-90000-11847
Status:
final
Fee:
N/A
Permit Type:
1 or 2 family dwe...
Building Type:
N/A
Unit 316 - replace floor tiles at kitchen laundry room & pantry (see cp2201161)
Valuation:
$3,350
Permit #:
BS2203917
Status:
final
Fee:
N/A
Permit Type:
N/A
Building Type:
Manufactured low-med
Propose new 1/2 bathroom in an existing rec room (interior remodel only no structural work)
Valuation:
$4,000
Permit #:
23016-10000-25210
Status:
final
Fee:
N/A
Permit Type:
1 or 2 family dwe...
Building Type:
N/A
Remove front covered patio and replace with new 5'0 x 28'0 attached covered patio. addition 22'0 x 15'6 attached trellis and addition 4'0 x 13'0 raised deck. replace (e) window with new door. all work per engineering
Valuation:
$7,000
Permit #:
17014-20000-00869
Status:
final
Fee:
N/A
Permit Type:
1 or 2 family dwe...
Building Type:
N/A
Kitchen remodel and dimmers in lviing room - see cp2101333
Valuation:
$1,750
Permit #:
BS2103754
Status:
final
Fee:
N/A
Permit Type:
N/A
Building Type:
Manufactured low-med
Kitchen remodel and dimmers in lviing room - see cp2101333
Valuation:
$1,750
Permit #:
BS2103753
Status:
final
Fee:
N/A
Permit Type:
N/A
Building Type:
Manufactured low-med
Kitchen remodel and dimmers in lviing room - see cp2101333
Valuation:
$1,750
Permit #:
BS2103752
Status:
final
Fee:
N/A
Permit Type:
N/A
Building Type:
Manufactured low-med
Supplemental permit 19042-90000-20738 to transfer permit from owner builder to contractor; # 935513 contractor name sound structures
Valuation:
N/A
Permit #:
19042-20001-20738
Status:
final
Fee:
N/A
Permit Type:
1 or 2 family dwe...
Building Type:
N/A
Supplemental permit 19041-90000-33019 to transfer permit from owner builder to contractor; # 935513 contractor name sound structures
Valuation:
N/A
Permit #:
19041-20001-33019
Status:
final
Fee:
N/A
Permit Type:
1 or 2 family dwe...
Building Type:
N/A
Supplemental permit 19042-90000-20594 to transfer from owner builder to contractor; # 935513 contractor name sound structures
Valuation:
N/A
Permit #:
19042-20001-20594
Status:
final
Fee:
N/A
Permit Type:
1 or 2 family dwe...
Building Type:
N/A
Adding 2 new countertop outlets
Valuation:
N/A
Permit #:
22041-90000-07273
Status:
final
Fee:
N/A
Permit Type:
Apartment
Building Type:
N/A
Adding 2 new countertop outlets
Valuation:
N/A
Permit #:
22041-90000-07274
Status:
final
Fee:
N/A
Permit Type:
Apartment
Building Type:
N/A
Int. remodel to 1st floor of (e) single family dwelling addition of 501 sqft on 1st floor & 269 sqft 2nd floor addition w new roof top deck on top of the 1st floor addition w/nfpa 13d sprinklers throughout
Valuation:
$97,818
Permit #:
21014-20000-04067
Status:
final
Fee:
N/A
Permit Type:
1 or 2 family dwe...
Building Type:
N/A
Supplemental permit 17016-90000-02629 to change work description; kitchen and 1 bathroom remodel for residential buildings (no structural changes). electrical plumbing included (heating pulled separately). replace drywall in kitchen bathroom and laundry room (no new walls added) for single family dwellings and duplexes only. **no fee**
Valuation:
N/A
Permit #:
17016-70001-02629
Status:
final
Fee:
N/A
Permit Type:
1 or 2 family dwe...
Building Type:
N/A
Reroof with 1 sqrs comparable shingle roofing over new solid sheathing. re-roof with class a or b material weighing less than 6 pounds per sq. ft. for residential roof replacement > 50% of the total roof area apply cool roof product labeled and certified by cool roof rating council (crrc). cool roof may be required for non-residential buildings per title 24 part 6 section 149(b). repl... see more
Valuation:
$2,079
Permit #:
16016-90000-16139
Status:
final
Fee:
N/A
Permit Type:
1 or 2 family dwe...
Building Type:
N/A
Replace drywall/plaster (patch and paint). non-structural repair only. interior kitchen remodel/repair (no changes in walls or openings). interior bathroom remodel/repair (no changes in walls or openings)
Valuation:
$16,720
Permit #:
17016-90000-02629
Status:
issued
Fee:
N/A
Permit Type:
1 or 2 family dwe...
Building Type:
N/A
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Sound Structures Reviews
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Recent Buildzoom Projects
Verified License
BuildZoom confirmed this contractor's license
Sound Structures License info
Verified License
| License # | 923028 |
| Status | Active |
| State | California |
| Type | General Building |
| Business Type | Sole Ownership, Corporation |
- BuildZoom verified this license was active as of February 2026.
Verify this license's status for Sound Structures at the California Contractors State License Board.
This is a sample of licensing data; click here to access a complete history.
Verified License
| License # | 935513 |
| Status | Active |
| State | California |
| Type | General Building |
| Business Type | Sole Ownership, Corporation |
- BuildZoom verified this license was active as of February 2026.
Verify this license's status for Sound Structures at the California Contractors State License Board.
This is a sample of licensing data; click here to access a complete history.
102
BuildZoom Score
Bonded
| Bonded Agent | Western Surety Company |
| Bond Value | $15,000 |
Insured
| Workers Comp Provider | State Compensation Insurance Fund |
21
Permits
- Building permit records show that Sound Structures has worked on 21 permitted projects.
Sound Structures Employees
CP
Christos George Poravas
Owner
MC
Monica Beth Mc Carthy
Officer
RS
Robin Chevalier Soper
Rmo / Ceo / Pres