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Location and Projects

Address
1340 Donner Ave, San Francisco, CA, 94124
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DUFFIN Construction

Duffin Construction & company provide premier construction services to our clients by consistently improving the quality of our product.
We add value to our clients projects through experience, innovation, foresight, integrity & performance. Our goal is to exceed our customers expectations and establish lasting relationships on every project.
We look forward to providing a tailored budget proposal for your upcoming project.

From BuildZoom: DUFFIN, 1340 Donner Ave, San Francisco, CA (Owned by: Stephen Duffin) holds a General Building license according to the California license board.

Their BuildZoom score of 154 ranks in the top 1% of 336,931 California licensed contractors.

Their license was verified as active when we last checked. If you are thinking of hiring DUFFIN, we recommend double-checking their license status with the license board and using our project planner to get competitive quotes.

DUFFIN Contact Information

Phone: (415) 760-7409
Address: 1340 Donner Ave, San Francisco, CA 94124

DUFFIN San Francisco

Quality

154
99th percentile
How is the BuildZoom score calculated?
Pro tip: We generally recommend hiring a contractor with a score higher than 95.
DUFFIN has a BuildZoom score of 154, which places them above 99% of 336,931 contractors in California.

Activity

2 projects
 2024
3 projects
 2023
Our building permit records indicate that DUFFIN has worked on at least 5.0 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.

Pricing

2 projects
 $20k-$50k
1 project
 $50k-$100k
Value Not Public: 2.0 projects
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.

DUFFIN Reviews
5 out of 5 stars, based on 6 reviews

  • By a user in San Francisco
    February 8, 2018
    Considered for Bathroom Remodeling (Commercial)

    Stephen was courteous and informed. Look forward to working with him.
  • By Verified Client
    August 29, 2017
    Considered for Multi-Room Remodel
  • By Claudia M.
    March 1, 2017
    Kitchen Remodel

    About 15 years ago Stephen Duffin remodeled my parents’ kitchen. My parents were so pleased with the high quality and service they received, that when it was time for my mother to leave the house, we turned to Stephen for help evaluate our options. He was very receptive, provided good ideas and timely quotes. Upon request, he engaged the services of other professionals and revised estimates as needed. Armed with a wealth of information my mother was able to arrive at a decision.
  • By Carmen M.
    December 7, 2016
    Building Remodel
    365 days

    Stephen Duffin was a consummate professional. He was thorough, detailed, friendly and easily accessible. He always made himself available to me, to answer any questions I had concerning my building. I would highly recommend Duffin Construction to anyone!
  • By Nancy C.
    September 15, 2016
    Verified Hire

    He was timely and they are very tidy. To the point where our neighbors actually came over to comments how neat and clean they've were as they were working. I thought that was very nice as the neighborhood like them. Steven has terrific design ideas and he absolutely pay attention to details. For future projects, well I would say sometimes it was hard to get a hold of him on the phone.

  • June 4, 2016

    They were great! Prompt with work, friendly, and helpful to my suggestions.
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Building Permits by DUFFIN

Sort by: Notable Notable | Date Date | Job Value Job Value

This is a sample of this contractor's permits. Click here to access their complete permit history.

Building
639 34th Ave, San Francisco, CA, 94121
2022-08-19
3rd story addition w roof deck. remodel entire (e) 2nd-story home. kitchen baths living spaces stairs hvac electrical plumbing and facade improvements
Valuation:
$500,000
Permit #:
202109148427
Status:
issued
Fee:
N/A
Permit Type:
N/A
Building Type:
27 - 1 family dwe...
Electrical
639 34th Ave, San Francisco, CA, 94121
2023-04-11
Install new 200 amp service new sub panel whole house rewire to include new receptacles lights switches heating system new circuits for 1 kitchen & 4 bathroms 1 posder room laundry
Valuation:
N/A
Permit #:
E202304116109
Status:
filed
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Building
887 28th Ave, San Francisco, CA, 94121
2022-01-12
1/f: interior non-compliance stair replacement in kind. 2/f: raise floor partially under the (e) vanity countertop at the bathroom to improve head clearance for (e) non-compliance interior stairway. install new vanities countertop and cabinets at bathroom. relocate outlets at bathroom
Valuation:
$20,000
Permit #:
202103035748
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
27 - 1 family dwe...
Building
2745 Octavia St, San Francisco, CA, 94123
2020-11-04
Turn (2) top floor units into (1) single unit. construct (n) 647 sf unit in (e) garage. construct (n) 477sf roof deck on (e) flat roof. plumbing mechanical & elect as req'd. lower garage seismic
Valuation:
$850,000
Permit #:
201412304694
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
24 - apartments
Building
88 Entrada Ct, San Francisco, CA, 94127
2021-09-03
Demolish of interior wall b/w kitchen and family room. addition new stairs b/w kitchen and family room. create trash enclosure at extg garage doors. new concrete footings for opening b/w kitchen and family and trash enclosure
Valuation:
$50,000
Permit #:
202109037750
Status:
issued
Fee:
N/A
Permit Type:
N/A
Building Type:
27 - 1 family dwe...
Plumbing
639 34th Ave, San Francisco, CA, 94121
2023-04-11
Install new water service from meter install new plumbing for 1 kitchen 4 bathrooms powder room wet bar water heater gas stove
Valuation:
N/A
Permit #:
PP20230411404
Status:
filed
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Building
321 Coleridge St, San Francisco, CA, 94110
2023-09-26
In response to complaint # 201988371. replace lower rear site retaining wall. install soldier piles with tiebacks and concrete walls
Valuation:
$80,000
Permit #:
202010096277
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
27 - 1 family dwe...
Building
639 34th Ave, San Francisco, CA, 94121
2023-04-21
Revision to pa 2021-0914-8427 (s1) sheet s2.1 and s3.4 to change perimeter foundtion to to retaining wall foundation
Valuation:
$24,500
Permit #:
202303294602
Status:
issued
Fee:
N/A
Permit Type:
N/A
Building Type:
27 - 1 family dwe...
Building
65 Almaden Ct, San Francisco, CA, 94118
2022-09-13
Revision to pa #201801168631. remove (e) n.g. furnace and water heater and install new combo hydronic system. heating is underfloor application
Valuation:
$10,000
Permit #:
202104289491
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
27 - 1 family dwe...
Building
887 28th Ave, San Francisco, CA, 94121
2021-07-09
Infill existing property line window in sunroom with 1-hour rated construction. (e) window was not used for light vent escape rescue. window at rear. not visible from street
Valuation:
$1,000
Permit #:
202105200668
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
27 - 1 family dwe...
Building
16 Entrada Ct, San Francisco, CA, 94127
2021-10-21
Voluntary strengthening of basement. repair cracked stucco and repair damaged wood sheathing at front & 2 sides of building approx 400 sf total. upgrade electrical service. install new water service
Valuation:
$45,000
Permit #:
202009144125
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
27 - 1 family dwe...
Building
60 Arguello Blvd, San Francisco, CA, 94118
2020-03-24
3rd floor master bathroom: install new sinks and counter in kind. replace shower and floor tile in kind. replace shower and floor tile in kind. install new exhaust for same location. reuse shower valve same location
Valuation:
$30,000
Permit #:
202001303098
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
27 - 1 family dwe...
Building
457 Tehama St, San Francisco, CA, 94103
2021-09-27
Recommencement and completion of work approved under pa# 201108112225
Valuation:
$300,000
Permit #:
202003126921
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
27 - 1 family dwe...
Building
199 Potrero Ave, San Francisco, CA, 94103
2024-05-31
Temporary shoring along perimeter for new development
Valuation:
$100,000
Permit #:
202212229011
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
16 - manufacturing
Building
555 2nd St, San Francisco, CA, 94107
2023-08-15
Replace existing heatpump with new split high efficiency heatpump system 900 sf
Valuation:
$21,600
Permit #:
202303294650
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
05 - food/beverag...
Plumbing
16 Entrada Ct, San Francisco, CA, 94127
2020-12-17
Install new 1-1/4 copper water service from meter to building interior addition water pressure regulator. correct 2 sections of flexible gas line at building crawl space interior. replace water heater
Valuation:
N/A
Permit #:
PP20200915047
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Building
584 Duncan St, San Francisco, CA, 94131
2019-05-22
Remodel extg kitchen in units 584 and 586. replace in kind fixtures for 586 bathroom. replace rear windows. relocate gas fireplace new skylights. replace in kind front facade windows
Valuation:
$138,000
Permit #:
201708084225
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
28 - 2 family dwe...
Electrical
88 Entrada Ct, San Francisco, CA, 94127
2021-10-26
Remodel kitchen and bathroom on main floor. relocate existing subpanel. new lighting and receptacles in kitchen family room and bathroom
Valuation:
N/A
Permit #:
E202110266387
Status:
filed
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Building
851 42nd Ave, San Francisco, CA, 94121
2018-05-02
Gr fl convert family room to bedroom new bedroom at front move stairs relocat bathroo laundry utility. convert part of kitchen to master bedroom relocate new stairs to gr fl, kitchen remodel
Valuation:
$220,000
Permit #:
201710060658
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
27 - 1 family dwe...
Building
1501 Beach St, San Francisco, CA, 94123
2019-11-12
At unit 302 replace 15 original windows w/marvin integrity fiberglass all ultrex windows to match other replacements previously permitted. no other work. some front facing street. approx 5. max u factor 0.32
Valuation:
$30,000
Permit #:
201908169023
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
24 - apartments