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Updated: May 20, 2026
Location and Projects
Address
4333 LANGER AVE, Santa Rosa, CA, 95407
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Terra Firma Excavation Photos
Terra Firma Excavation Engineer
Terra Firma Excavation, 4333 Langer Ave, Santa Rosa, CA (Employees: David True Heitz, Frederick Albert Soued, and Jason Gregory Amoss) holds a General Building license and 3 other licenses according to the California license board.
Their BuildZoom score of 108 ranks in the top 5% of 336,931 California licensed contractors.
Their license was verified as active when we last checked. If you are thinking of hiring Terra Firma Excavation, we recommend double-checking their license status with the license board and using our project planner to get competitive quotes.
Terra Firma Excavation Services
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Terra Firma Excavation Contact Information
Phone Number: (707) 500-4040
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Address: 4333 LANGER AVE, Santa Rosa, CA 95407
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Terra Firma Excavation Santa Rosa
Quality
108
95th percentile
Pro tip:
We generally recommend hiring a contractor with a score higher than 95.
Terra Firma Excavation has a BuildZoom score of 108, which places them above 95% of 336,931 contractors in California.
Activity
|
2 projects
|
2025 |
|
1 project
|
2024 |
|
1 project
|
2023 |
Our building permit records indicate that Terra Firma Excavation has worked on at least
4.0 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
|
3 projects
|
$20k-$50k |
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 Terra Firma Excavation
This is a sample of this contractor's permits. Click here to access their complete permit history.
Light drywall remediation new shower fixture vanity and refilling the bathtub area new insulation. small dry rot r/r few studs. remove and install shower/bath area due to leak
Valuation:
$5,000
Permit #:
202501148244
Status:
issued
Fee:
N/A
Permit Type:
N/A
Building Type:
24 - apartments
Unit# 1: kitchen - like for like- new countertops cabinets sink electrical to code w dedicated breakers. bathroom - like for like - new tub tile walls floor sink vanity electrical to code w dedicated breakers
Valuation:
$48,000
Permit #:
202312152647
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
24 - apartments
Alteration of existing 45 sf bathroom and janitorial closet and hall area into 134 sf accessible bathroom
Valuation:
$40,000
Permit #:
B24-0204
Status:
final
Fee:
$1,185
Permit Type:
N/A
Building Type:
N/A
Unit 1: dedicated outlets in kitchen for stove fridge 2 kitchen c.t disp dw m.r ded. outlet bathroom and new breaker box to bring up to code
Valuation:
N/A
Permit #:
E202312151234
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Mold remediation and repair work 700 sq. ft. ok to issue per l.kirk
Valuation:
$35,000
Permit #:
B22-6368
Status:
final
Fee:
$916
Permit Type:
N/A
Building Type:
N/A
Unit 1: bathroom remodel like for like (tub sink shower head and mixer valve) kitchen remodel like for like (sink)
Valuation:
N/A
Permit #:
PP20231215497
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Kitchen & bathroom remodeling including shower pan
Valuation:
N/A
Permit #:
PP20171222455
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Install hvac furnace flues
Valuation:
N/A
Permit #:
PM20171222457
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Remove an at grade brick and concrete patio and fire pit attached to the accessary structure at rear. repair bottom portion of the wall on the accessary structure. zw1600195. 5/11/16: replace all siding with rustic v cedar replace door and window trim with cedar. replace pier footings as needed. drx160777
Valuation:
$5,000
Permit #:
RB1601815
Status:
final
Fee:
$398
Permit Type:
N/A
Building Type:
N/A
Permit value$1k remove an at grade brick and concrete patio and fire pit attached to the accessary structure at rear. repair bottom portion of the wall on the accessary structure. zw1600195
Valuation:
N/A
Permit #:
RB1601815
Status:
ISSUED
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Interior remodel; kitchen and 2 bathrooms, replacement of windows and door, new furnace and tankless water heater.
Valuation:
$87,328
Permit #:
B2017-00228
Status:
final
Fee:
$4,892
Permit Type:
Alteration
Building Type:
N/A
Conversion of 200 sq enclosed attached garage (one of three enclosed garage spaces) to bedroom with toilet sink and shower enclosure
Valuation:
$10,000
Permit #:
B16-1038
Status:
final
Fee:
$928
Permit Type:
N/A
Building Type:
N/A
Remodel master bathroom convert closet to half bathroom and remodel kitchen. seismic strengthening of underfloor area to reduce risk of damage per plan set a
Valuation:
$40,000
Permit #:
RB1602729
Status:
final
Fee:
$1,383
Permit Type:
N/A
Building Type:
N/A
Replacement second unit mobile home 2136 sf
Valuation:
$195,145
Permit #:
BMR150380
Status:
APPLIED
Fee:
$7
Permit Type:
N/A
Building Type:
N/A
Replacement mobile home install 1600 sf
Valuation:
$146,176
Permit #:
BMR150395
Status:
APPLIED
Fee:
$262
Permit Type:
N/A
Building Type:
N/A
Mobile home installation 1646 sf
Valuation:
$150,379
Permit #:
BMR170108
Status:
APPLIED
Fee:
$262
Permit Type:
N/A
Building Type:
N/A
Install for mh on perm found
Valuation:
$262,112
Permit #:
BMR160694
Status:
APPLIED
Fee:
$277
Permit Type:
N/A
Building Type:
N/A
Install to mh on perm found
Valuation:
$180,893
Permit #:
BMR170139
Status:
ISSUED
Fee:
$266
Permit Type:
N/A
Building Type:
N/A
Install for 2nd dwelling mh on pf - primary unit
Valuation:
$281,023
Permit #:
BMR150103
Status:
APPLIED
Fee:
$279
Permit Type:
N/A
Building Type:
N/A
Mh install second unit
Valuation:
$153,485
Permit #:
BMR160254
Status:
ISSUED
Fee:
$263
Permit Type:
N/A
Building Type:
N/A
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Terra Firma Excavation Reviews
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Verified License
BuildZoom confirmed this contractor's license
Terra Firma Excavation License info
Verified License
| License # | 847246 |
| 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 Terra Firma Excavation at the California Contractors State License Board.
This is a sample of licensing data; click here to access a complete history.
Verified License
| License # | 878612 |
| Status | Active |
| State | California |
| Type | General Engineering |
| Business Type | Sole Ownership |
- BuildZoom verified this license was active as of April 2026.
Verify this license's status for Terra Firma Excavation at the California Contractors State License Board.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | 374166 |
| 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 Terra Firma Excavation at the California Contractors State License Board.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | 415561 |
| Status | Inactive |
| State | California |
| Type | General Building, General Engineering |
| 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 Terra Firma Excavation at the California Contractors State License Board.
This is a sample of licensing data; click here to access a complete history.
108
BuildZoom Score
Bonded
| Bonded Agent | Accredited Surety & Casualty Company Inc |
| Bond Value | $15,000 |
Insured
| Workers Comp Provider | State Compensation Insurance Fund |
63
Permits
- Building permit records show that Terra Firma Excavation has worked on 63 permitted projects.
Terra Firma Excavation Employees
DH
David True Heitz
Sole Owner
FS
Frederick Albert Soued
General Partner
JA
Jason Gregory Amoss
Sole Owner
JS
Joanne Ethel Soued
General Partner
MS
Michael P Soued
Sole Owner