Updated: Apr 26, 2026
Location and Projects
Address
355 11TH ST STE 300, San Francisco, CA, 94103
Use our bidding system to
request a quote
Gast David S Architect
Gast David S, 355-11 Th St, San Francisco, CA (Employees: David S Gast and David S. Gast) holds a Architect license and 4 other licenses according to the California license board.
Their BuildZoom score of 104 ranks in the top 9% of 336,931 California licensed contractors.
Their license was verified as active when we last checked. If you are thinking of hiring Gast David S, we recommend double-checking their license status with the license board and using our project planner to get competitive quotes.
Gast David S Services
Start a project today:
Gast David S Contact Information
Phone Number: (415) 885-2946
Edit
Address: 355 11TH ST STE 300, San Francisco, CA 94103
Edit
Do you work for this business? Unlock this free profile to update company info and see who's viewing your profile.
Gast David S San Francisco
Quality
104
91st percentile
Pro tip:
We generally recommend hiring a contractor with a score higher than 95.
Gast David S has a BuildZoom score of 104, which places them above 91% of 336,931 contractors in California.
Activity
|
3 projects
|
2025 |
|
7 projects
|
2024 |
|
3 projects
|
2023 |
Our building permit records indicate that Gast David S has worked on at least
13.0 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
|
3 projects
|
Home Additions |
Analyzing permits over the last 4 years shows that Gast David S mostly works on
home addition
projects.
Pricing
|
2 projects
|
< $5k |
|
2 projects
|
$5k-$20k |
|
3 projects
|
$20k-$50k |
|
1 project
|
$50k-$100k |
|
3 projects
|
$100k-$250k |
|
2 projects
|
$250k-$500k |
|
2 projects
|
$500k-$1mil |
The typical size of their permits is approximately $60,611. 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.
This is a sample of this contractor's permits. Click here to access their complete permit history.
Kitchen remodel at 2nd floor. mass reduction at east side facade at 2nd floor. skylight replacement at 2nd floor roof. window changes at 2nd and 4th floor rear (south) facade.window changes at 2nd floor side (east) facade. addition air conditioning to the 3rd and 4th floor
Valuation:
$160,000
Permit #:
202402226353
Status:
issued
Fee:
N/A
Permit Type:
N/A
Building Type:
27 - 1 family dwe...
Renovation & partition changes all (3) flrs. provide (n) mep fixtures finishes & fittings. addition (1) skylight replace (1) exterior door & (16) windows. rebuild fencing gate & addition lanscape at (n) rear entry.conver 1st space to habitable
Valuation:
$355,000
Permit #:
202211297319
Status:
issued
Fee:
N/A
Permit Type:
N/A
Building Type:
27 - 1 family dwe...
Regrade (e) concrete driveway slabs with new curbs and new trench drains. regrade (e) garage slab slope to new trench drain at exit. note: all work is within the property line no encroachment
Valuation:
$7,300
Permit #:
202505146433
Status:
filed
Fee:
N/A
Permit Type:
N/A
Building Type:
24 - apartments
Addition 303 sf of (n) unconditioned storage space at (e) garage replace stair from garage to basement interior partition changes plumbing/electrical @ garage/basement. no change to building envelope
Valuation:
$225,000
Permit #:
202212239113
Status:
issued
Fee:
N/A
Permit Type:
N/A
Building Type:
27 - 1 family dwe...
Construct(n)1st(office)&3rd(1bed, 1bath)story extention@the rear.remodel entire house w/(n)layouts.excavate+/-11"@ground lvl for(n)living space(guest suite&office).shift facade entry&increase garage door ht.demo(2)&construct(3)(n)window bays on front facade.in-fill(2)story lightwell on the east side
Valuation:
$720,000
Permit #:
202103226960
Status:
issued
Fee:
N/A
Permit Type:
N/A
Building Type:
27 - 1 family dwe...
Renovations to existing single family dwelling including: -new horizontal addition at rear. -new rear yard patio & landscaping. -new stair penthouse to new roof deck. -new 2 story infill at rear. -new infill behind facade at exterior entry porch. -interior remodel on all 3 floors
Valuation:
$497,000
Permit #:
202103257298
Status:
issued
Fee:
N/A
Permit Type:
N/A
Building Type:
27 - 1 family dwe...
Convert 1/f storage workshop & crawlspace to habitable space w/int stairs to 2/f. minor renovation to 2/f replacement stairs btwn 2/f & 3/f. reorganize 3/f interior. new insulated clad wood windows & doors. new extension fiber cement plank siding upgrade to seismic resistance. electrical plumbing hvac systems
Valuation:
$585,000
Permit #:
201908280046
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
27 - 1 family dwe...
Replace (e) roof access skylight hatch w 120 sqft stair penthouse at roof. reconstruct (e) roof deck to (n) 410 sqft roof deck. provide (2) 80"x62 steel frames heating fixture mounts. provide planters 30"x42 guardwalls & 69 glass windscreens. relocate (e) natural gas line/water install 120v pow
Valuation:
$150,000
Permit #:
202312072143
Status:
issued
Fee:
N/A
Permit Type:
N/A
Building Type:
28 - 2 family dwe...
Repair (e) extension concrete stair/landing remove (e) brick stair addition new waterproof membrane clad stairs landing w/stone new handrails lights @ extension stairs new mail/package drop. no change to building envelope
Valuation:
$75,000
Permit #:
202308154431
Status:
issued
Fee:
N/A
Permit Type:
N/A
Building Type:
27 - 1 family dwe...
Addition and remodel to single family dwelling. 1st floor addition of 65sf at front facade entry and living room window bay area and remodeling existing dwelling of 2 356sf. convert 350sf of (e) sloped roof to (n) flat roof with skylights. alter entryway double gable roof to become a flat roof. addition new rear open deck with trellis and hot tub/spa. interior remodel to 1st and 2nd f... see more
Valuation:
$600,000
Permit #:
BD-2018-265658
Status:
final
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Construct 1 story vertical & 3 story horizontal addition to (e) 2 story single family residence. remove (e) 1 story wood deck @ rear & provide 1 deck @ 3rd floor & 1 roof deck. relocate entry to 1st floor. renovate 2 story interior with new partitions & finishes
Valuation:
$561,000
Permit #:
201904248872
Status:
issued
Fee:
N/A
Permit Type:
N/A
Building Type:
27 - 1 family dwe...
(unit #1 & #4) unit #1: demolish & relocate (e) stair from kitchen to rear patio. kitchen remodel include windows electrical mechanical & plumbing per plans. unit #4: raise ceiling 18. bathroom & bedroom remodel including partitions & mep
Valuation:
$85,000
Permit #:
202208110377
Status:
issued
Fee:
N/A
Permit Type:
N/A
Building Type:
24 - apartments
2nd floor revision to pa#201908229631. scope of revision includes a change in location of the mechanical room and interior non-structural wall change to guest bedroom & storage.there are no changes to the approved 3rd floor level or exterior envelope
Valuation:
$28,250
Permit #:
202206095978
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
27 - 1 family dwe...
To erect a 4-story no basement type v-b building w/two family dwelling units. sprinkler per nfpa 13r solar sprinkler monitoring under sep permits
Valuation:
$972,000
Permit #:
201807033665
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
28 - 2 family dwe...
Renovations to legalize (e) rear unit to provide light ventilation fire egress exit corridor & outdoor space. addition 688 sq ft vertical additon with 123 sq ft roof deck above (e) renovated rear unit. provide type 13-d sprinkler system
Valuation:
$430,000
Permit #:
201611223380
Status:
reinstated
Fee:
N/A
Permit Type:
N/A
Building Type:
28 - 2 family dwe...
Expand (e) dormer at north roof & upgrade structure at roof to support expanded dormer. no addition of new habitable/conditioned space
Valuation:
$10,000
Permit #:
202408017722
Status:
issued
Fee:
N/A
Permit Type:
N/A
Building Type:
27 - 1 family dwe...
1'-0 deep deck extension at 4th floor rear. 2'-0 horizontal in-fill addition at east light wellconvert 3 living room openings to 21'-0 wide lift/slide door.provide 4(n) washrooms and replace units throughout. remove fure escape addition fire suppression (under sep permit). interior renovations.maher n/a
Valuation:
$500,000
Permit #:
201602179752
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
28 - 2 family dwe...
1st fl - addition powder room & convert office to media. addition patio deck at 1st fl and cantilevered blacony at 3rd fl; remove (e) 3rd fl window bay at rear addition roof deck above. replace front facade picture window door and garage door. excavate at 1st fl to extend new interior stair. interior reno to inclu
Valuation:
$631,267
Permit #:
201709209130
Status:
expired
Fee:
N/A
Permit Type:
N/A
Building Type:
27 - 1 family dwe...
#3:rev to 201609299161.int remodel: r&r (e) finish flooring interior walls & dropped ceiling. install new elect service power & lighting. (e) steam heat to remain with new radiators. install five windows in modif openings. install (n) branch plumbing & fix. windows 1, 2, 24.08, 09, window 7 inkindmaher na
Valuation:
$350,000
Permit #:
201703161624
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
24 - apartments
Int reno to (e) kitchen powder room master suite hall bathroom laundry closet and 2 bedroomw ith new fixtures fitting and finishes. install 2 (n) window units. install 2 new curb mounted roof skylight. provide hydronic radiant heating system throughout w/high efficiency combo domestic hot water
Valuation:
$250,000
Permit #:
201710050475
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
27 - 1 family dwe...
Similar Contractors See more
156
BZ Score
$218K
Avg Project
-
Projects
154
BZ Score
$67.5K
Avg Project
-
Projects
152
BZ Score
$73.9K
Avg Project
-
Projects
Gast David S Reviews
BuildZoom hasn't received any reviews for Gast David S. Click here to be alerted when reviews are posted about them.
Recent Buildzoom Projects
Verified License
BuildZoom confirmed this contractor's license
Gast David S License info
Verified License
| License # | C10895 |
| Status | Active |
| State | California |
| Type | Architect |
- BuildZoom verified this license was active as of August 2025.
Verify this license's status for Gast David S at the California Architect License Board.
This is a sample of licensing data; click here to access a complete history.
License Not Verified
| License # | 26969 |
| Status | Active |
- BuildZoom has not yet reviewed this license for verification.
This is a sample of licensing data; click here to access a complete history.
License Not Verified
| License # | 26969 |
| Status | Active |
| State | California |
- When BuildZoom last verified this license, it had an expiration date of December, 2021. Check the current license status of Gast David S with the California Architect License Board
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | 321637 |
| Status | Inactive |
| State | California |
| Type | General Building |
- 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 Gast David S at the California Contractors State License Board.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | 8203 |
| Status | Inactive |
| State | Louisiana |
| Type | Architect |
- According to the Louisiana Board of Architects, 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 Gast David S at the Louisiana Board of Architects.
This is a sample of licensing data; click here to access a complete history.
104
BuildZoom Score
Bonded
| Bonded Agent | This License Filed A Contractor's Bond With |
| Bond Value | $2,500 |
79
Permits
- Building permit records show that Gast David S has worked on 79 permitted projects.
Gast David S Employees
DG
David S Gast
Sole Owner
DG
David S. Gast
Licensee
GS
Gast David S
Owner