1
Darren Lee
Based in San Francisco
6 home addition permits in SF, latest Aug 2026, median permit value $533k · addition, deck, interior remodel
licensed 33 yrs
Active · B · #672385 · Bond ✓ · Workers' comp ✓ · Verify on CSLB
Home addition contractors in the Bay Area
43 contractors have addition permit records. CSLB license data dated Oct 16, 2026.
Which license do you need?
B license required. An addition needs a B (General Building) contractor. A B-2 may not touch footings, foundations, load-bearing walls or roof structure, and every addition does.
Do you need a permit?
It depends on your city. Pick yours below for what it requires for a addition job, with the source.
Cost. Half of addition permits declared $220k to $721k, not total project cost. Details
Pick your city for addition permit rules
25 of 43 with addition permits
Source: DataSF permits, 24 months to Oct 18, 2026.
Sorted by Bay Area home addition permits in the last 24 months, then years licensed. 18 more have addition permit records and aren't shown. How we rank.
2
Ren Lei Construction Co Inc
Based in San Francisco
5 home addition permits in SF, latest Mar 2026, median permit value $483k · addition, bath, kitchen
licensed 34 yrs
Active · B · #635360 · Bond ✓ · Workers' comp ✓ · Verify on CSLB
3
C H Burnham Inc
Based in San Francisco
4 home addition permits in SF, latest Sep 2026, median permit value $270k · addition, interior remodel, bath
licensed 15 yrs
Active · B · #965331 · Bond ✓ · Workers' comp ✓ · Verify on CSLB
4
At6 Architecture + Design Build
Based in San Francisco
3 home addition permits in SF, latest Apr 2026, median permit value $189k · addition, bath, interior remodel
licensed 53 yrs
Active · B · #283485 · Bond ✓ · Workers' comp ✓ · Verify on CSLB
5
Planart Construction Corp
Based in San Francisco
3 home addition permits in SF, latest Sep 2026, median permit value $727k · addition, interior remodel, bath
licensed 16 yrs
Active · B · #942728 · Bond ✓ · Workers' comp ✓ · Verify on CSLB
6
Recon360 LLC
Based in San Jose
3 home addition permits in SF, latest Jan 2025, median permit value $2k · roofing
licensed 16 yrs
Active · B · #950805 · Bond ✓ · Workers' comp ✓ · Verify on CSLB
C-33 Painting and DecoratingC-39 Roofing
Workers' comp policy ends Nov 1, 2026. Ask for the renewal certificate.
7
Rod Heisler Construction & Management Inc
Based in Oakland
3 home addition permits in SF, latest Jul 2026, median permit value $415k · addition, bath, interior remodel
licensed 12 yrs
Active · B · #992421 · Bond ✓ · Workers' comp ✓ · Verify on CSLB
8
AMS Acropolis Construction Incorporated
Based in San Francisco
3 home addition permits in SF, latest May 2026, median permit value $211k · addition, deck, flooring
licensed 8 yrs
Active · B · #1034015 · Bond ✓ · Workers' comp ✓ · Verify on CSLB
9
MN Builders
Legal name: Mueller Nicholls Inc · Based in Oakland
2 home addition permits in SF, latest May 2026, median permit value $1.8M · addition, interior remodel, adu
licensed 36 yrs
Active · B · #588872 · Bond ✓ · Workers' comp ✓ · Verify on CSLB
10
Nima Construction Company
Based in San Rafael
2 home addition permits in SF, latest Feb 2026, median permit value $100k · addition, interior remodel
licensed 28 yrs
Active · B · #746802 · Bond ✓ · Workers' comp ✓ · Verify on CSLB
Show #11 to 25
11
Fog Horn Builders Inc
Based in San Francisco
2 home addition permits in SF, latest May 2025, median permit value $108k · addition, bath, deck
licensed 28 yrs
Active · B · #749698 · Bond ✓ · Workers' comp ✓ · Verify on CSLB
12
Hong Shink Construction Inc
Based in Millbrae
2 home addition permits in SF, latest Oct 2025, median permit value $274k · addition, bath, deck
licensed 27 yrs
Active · B · #758888 · Bond ✓ · Workers' comp ✓ · Verify on CSLB
13
Jeff King & Company Inc
Based in San Francisco
2 home addition permits in SF, latest Jun 2026, median permit value $754k · interior remodel, addition, garage
licensed 26 yrs
Active · B · #772547 · Bond ✓ · Workers' comp ✓ · Verify on CSLB
Workers' comp policy ends Oct 21, 2026. Ask for the renewal certificate.
14
Kenneally Construction Inc
Based in San Francisco
2 home addition permits in SF, latest Apr 2026, median permit value $328k · addition, deck, bath
licensed 26 yrs
Active · B · #773788 · Bond ✓ · Workers' comp ✓ · Verify on CSLB
15
Keegan Construction Incorporated
Based in San Francisco
2 home addition permits in SF, latest May 2026, median permit value $848k · addition, accessibility, bath
licensed 25 yrs
Active · B · #792673 · Bond ✓ · Workers' comp ✓ · Verify on CSLB
16
MRCC
Based in San Francisco
2 home addition permits in SF, latest Aug 2026, median permit value $530k · interior remodel, addition, bath
licensed 23 yrs
Active · B · #821253 · Bond ✓ · Workers' comp ✓ · Verify on CSLB
17
McMahon Construction LLC
Based in San Francisco
2 home addition permits in SF, latest Jun 2026, median permit value $199k · addition, bath, demolition
licensed 23 yrs
Active · B · #823609 · Bond ✓ · Workers' comp ✓ · Verify on CSLB
18
S L M Development Inc
Based in San Francisco
2 home addition permits in SF, latest Sep 2026, median permit value $370k · addition, bath, flooring
licensed 22 yrs
Active · B · #841898 · Bond ✓ · Workers' comp via leasing · Verify on CSLB
19
Abbeyside Construction Inc
Based in San Francisco
2 home addition permits in SF, latest Sep 2026, median permit value $744k · addition, bath, kitchen
licensed 21 yrs
Active · B · #849012 · Bond ✓ · Workers' comp ✓ · Verify on CSLB
20
Thompson - Suskind L P
Based in San Francisco
2 home addition permits in SF, latest May 2026, median permit value $539k · addition, flooring, interior remodel
licensed 21 yrs
Active · B · #860556 · Bond ✓ · Workers' comp via leasing · Verify on CSLB
21
Cardea Building Co
Legal name: Dimension Design Group · Based in San Francisco
2 home addition permits in SF, latest Aug 2026, median permit value $323k · addition, bath, deck
licensed 21 yrs
Active · B · #860686 · Bond ✓ · Workers' comp ✓ · Verify on CSLB
C-6 Cabinet, Millwork, Finish Carpentry
22
Saturn Construction Co
Based in San Francisco
2 home addition permits in SF, latest Sep 2026, median permit value $763k · addition, adu, bath
licensed 21 yrs
Active · B · #861233 · Bond ✓ · Workers' comp ✓ · Verify on CSLB
23
Devlin / MC Nally Construction
Based in San Francisco
2 home addition permits in SF, latest Jun 2026, median permit value $260k · addition, flooring, interior remodel
licensed 19 yrs
Active · B · #896044 · Bond ✓ · Workers' comp ✓ · Verify on CSLB
Workers' comp policy ends Nov 30, 2026. Ask for the renewal certificate.
24
O Donoghue Construction Inc
Based in San Francisco
2 home addition permits in SF, latest May 2026, median permit value $1.3M · addition, adu, deck
licensed 18 yrs
Active · B · #917704 · Bond ✓ · Workers' comp ✓ · Verify on CSLB
25
Bay C T Construction Inc
Based in San Francisco
2 home addition permits in SF, latest Oct 2026, median permit value $229k · addition, bath, flooring
licensed 18 yrs
Active · B · #922224 · Bond ✓ · Workers' comp ✓ · Verify on CSLB
Payment doesn't change the order. Business build-out? See commercial GCs. Each card shows CSLB data from the file dated Oct 16, 2026. Verify live on CSLB.
What a addition job costs
Half of the 100 addition permits declared between $220k and $721k (median $415k).
Declared permit valuation, not total project cost
Bay Area permits from the last 24 months to Oct 18, 2026. The value is what the applicant wrote on the permit, so it is not what a homeowner paid in total. Not every permit lists a value, so we take each contractor's median value and weight it by its permit count; it covers 100 permits from 43 contractors. Source: DataSF. For an estimate by size and finish, use the home construction cost calculator.
Planning an accessory dwelling unit? That has its own site: Bay Area ADU Builders.
B or B-2: which license fits your job
Both classes can act as your prime contractor. A B-2 is limited to remodels of an existing wood-frame house. If your plan changes the structure, look for a B.
| Job | B General Building | B-2 Residential Remodeling |
|---|---|---|
| Kitchen or bath remodel in an existing house | Yes | Yes, when the contract covers 3 or more unrelated trades |
| Addition or new rooms | Yes | No |
| Moving or removing a load-bearing wall | Yes | No |
| New home | Yes | No |
| Commercial or tenant work | Yes | No |
Sources: CSLB, class B and class B-2, checked Oct 18, 2026. More in B vs B-2.
California rules for your contract
A down payment on a home improvement contract can't be more than $1,000 or 10% of the price, whichever is less. No progress payment can be more than the work done or materials delivered.
Source: California B&P Code 7159.5, checked Oct 18, 2026
Work under $1,000 in total (labor and materials) that needs no building permit doesn't require a license. The exemption doesn't apply if the person advertises as a contractor, has employees, or splits a job to stay under the limit.
Source: California B&P Code 7048, checked Oct 18, 2026
Every licensed contractor must keep a $25,000 contractor's bond on file with CSLB. That has been the amount since January 1, 2023.
Source: CSLB, bond requirements, checked Oct 18, 2026
A contractor with employees must carry workers' comp. Until 2028, a B contractor with no employees can legally file an exemption, so check which one yours did. From January 1, 2028, a workers' comp certificate is required for every license.
Source: CSLB, workers' compensation, checked Oct 18, 2026
Complaint history isn't in CSLB's free data files, so we don't show it. Check complaints on CSLB before you sign.
Other project types in the Bay Area
How this list is built
San Francisco permits come from DataSF, matched by license number. San Jose permits come from the city's open data, matched by business name. A contractor is listed only with evidence for addition work: a permit record whose description matches, or a source the contractor gave us.
License class, status, dates, bond and workers' comp come from CSLB's public data files: Master file Oct 16, 2026, workers' comp file Oct 17, 2026, processed Oct 18, 2026. Each card links to that license's live CSLB record. Full method.