Cooper General Contracting
ADU builder working in San Diego. Licensed since 1987.
- License active
- Workers' comp on file
36 jobs on San Diego permits, 2022 to 2026: 32 ADUs, 3 home additions, 1 remodel. 3rd most ADU permits of 105 contractors in San Diego.
What the public records show
From the state's license records and the city's permits, one question at a time.
| Question | Records show | Mark |
|---|---|---|
| Licensed? | License 519562, active in the state's records on Sep 23, 2026General buildingNo disciplinary case on the state's file.We found this license by the business name. No other active license has that name. | Checks out |
| Workers' comp? | Workers' comp policy on file with the stateThis covers their crew if someone is hurt. It is not insurance for your home. | On file |
| In business? | Licensed since 1987 | |
| Jobs on record | 36 jobs on San Diego permits, 2022 to 2026: 32 ADUs, 3 home additions, 1 remodel3rd most ADU permits of 105 contractors in San Diego. That counts jobs, not quality.Our San Diego permit records cover October 2021 to September 2026. |
Records: the state license board and City of San Diego permits.
Cost and timing
All ADU jobs in San Diego: $68,000 to $172,000
Half of 1,329 city permits list an amount in this range. Permit amounts are often lower than what you pay.
- Detached ADUs in San Diego: $70,000 to $176,000 (789 permits)
- Garage conversions in San Diego: $48,000 to $117,000 (175 permits)
- Junior ADUs in San Diego: $57,000 to $147,000 (94 permits)
How to read this range
Contractors write a job value on the permit form, and the city uses it to set the permit fee. It is not the contract price, and it is often lower than what you pay. A quarter of the permits list less than this range, and a quarter list more. Use it to see if a quote is in the normal range.
Permit value (not a price)
Their typical permit lists $102,960 (half list more, half less)
That is the figure written on the permit form, which can be far from what you pay. What ADU jobs cost in San Diego.
Get 2 or 3 written quotes.
Track record
7 jobs in the last 12 months, down from 10 the year before
Jobs by kind of work
Latest jobs
Permit values are what the contractor wrote on the permit form, not what the owner paid.
A row marked ×2 or more stands for that many similar jobs on one day in one ZIP code.
| Date | Work | On the permit form |
|---|---|---|
| Aug 21, 2026 | ADUADU PENINSULA: Combination permit for a proposed ADU over a section of an existing garage and… | $50,336 |
| Dec 10, 2025 | AdditionADU PENINSULA; Combination building permit for a proposed garage-to-ADU conversion and addition,… | $89,462 |
| Dec 10, 2025 | ADUADU PENINSULA; Combination building permit for a proposed garage-to-ADU conversion and addition,… | $89,462 |
| Nov 3, 2025 | ADUADU SOUTHEASTERN SAN DIEGO: Combination building permit for proposed attached unit B from an… | $81,510 |
| Oct 13, 2025 | Remodel | $470,469 |
| Oct 13, 2025 | Addition | $470,469 |
| Oct 13, 2025 | ADU | $470,469 |
| Jul 21, 2025 | ADUADU NORTH PARK: Building, Mechanical, Plumbing, Electrical permits for an interior improvement to… | $91,728 |
| Jun 6, 2025 | ADUADU OCEAN BEACH: Building, Electrical, Mechanical and Plumbing permits for proposed conversion of… | $108,368 |
| May 17, 2025 | ADUADU OCEAN BEACH, Building, mechanical, electrical, and plumbing permits for the conversion of (2)… | $88,078 |
| May 15, 2025 | ADUADU CLAIREMONT MESA: Combination building permit for proposed 1-story ADU on a lot with an existing… | $132,536 |
| Feb 26, 2025 | ADUADU PENINSULA : Combination Building Permit for the construction of the proposed detached 2-story… | $168,983 |
| Dec 31, 2024 | ADUADU MID-CITY:CITY HEIGHTS: Building, mechanical, electrical, and plumbing permits to convert… | $124,852 |
| Dec 18, 2024 | ADUADU PENNISULA; Combination Building Permit for a proposed detached, 2-story ADU, accessory to an… | $198,804 |
| Nov 8, 2024 | ADUADU PENINSULA: Combination Building Permit for a proposed detached (N) ADU to an (E ) SDU | $84,823 |
| Oct 14, 2024 | ADU (×2, same day)ADU OCEAN BEACH. Combination building permit for proposed (2) 2-story ADUs at an existing SDU. … | $168,486 each |
| May 30, 2024 | ADUADU OCEAN BEACH; Combination building permit for a detached garage-to-ADU conversion at an (E) SDU.… | $101,390 |
| Apr 19, 2024 | ADUADU CLAIREMONT MESA : Combination permit for the proposed detached two -story Accessory Dwelling… | $198,804 |
| Apr 10, 2024 | ADU (×4, same day) | $115,399 each |
| Mar 5, 2024 | ADU | not stated |
| Mar 5, 2024 | ADU | $71,731 |
| Mar 5, 2024 | ADU | $102,960 |
| Feb 1, 2024 | ADUADU NORTH PARK: Building, mechanical, electrical and plumbing permits for the proposed conversion… | $74,800 |
| Jan 30, 2024 | ADUADU MID CITY: KENSINGTON TALMADGE: Building Mechanical Electrical Plumbing Permit for the garage… | $101,822 |
| Jan 26, 2024 | ADUADU PENINSULA: Building, mechanical, electrical, plumbing permits for six ADUs for an existing MDU.… | $230,648 |
| Jan 11, 2024 | ADUADU NORTH PARK: Building, electrical, mechanical and plumbing permits for proposed conversion of 6… | $95,040 |
| Jul 3, 2023 | ADUADU PACIFIC BEACH; Combination building permit to convert existing detached garage with 4 spaces… | $86,856 |
| Sep 1, 2022 | AdditionADU SCOPE CHANGE 4/20/2022***MID-CITY:CITY HEIGHTS; Combination permit for addition 2story detached… | $102,866 |
| Sep 1, 2022 | ADUADU SCOPE CHANGE 4/20/2022***MID-CITY:CITY HEIGHTS; Combination permit for addition 2story detached… | $102,866 |
| Jul 19, 2022 | ADUADU MID-CITY:CITY HEIGHTS; Building and MEP permit to convert existing attached garages into (2)… | $81,488 |
| May 12, 2022 | ADUADU MID-CITY:CITY HEIGHTS: Building, Mechanical, Electrical Plumbing permit for existing garage… | $28,864 |
| Apr 25, 2022 | ADUADU COLLEGE AREA: Combination building permit for a new two story four bedrooms and two bathrooms… | $130,297 |
What to ask before you hire
About Cooper General Contracting
- Ask what the warranty covers and for how long, in writing.
Worth asking any ADU builder
- Can you show me proof of liability insurance and your bond?
- Do you handle the plans, engineering and utility hookups, or do I?
- How long from permit to the final inspection on your last three ADUs?
- What is the payment schedule, and what is extra?
Get a quote from Cooper General Contracting
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