Spearhead Construction
ADU builder working in San Diego.
- No license matched this business by name in the state's records
21 jobs on San Diego permits, 2023 to 2026: 12 ADUs, 8 solar installations, 1 home addition. 11th most ADU permits of 105 contractors in San Diego.
What the public records show
From the city's permits, one question at a time.
| Question | Records show | Mark |
|---|---|---|
| Licensed? | No license matched this business by name in the state's records | Ask them |
| Jobs on record | 21 jobs on San Diego permits, 2023 to 2026: 12 ADUs, 8 solar installations, 1 home addition11th 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: 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 $113,615 (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
8 jobs in the last 12 months, up from 4 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 |
|---|---|---|
| Jun 19, 2026 | Solar | not stated |
| Apr 23, 2026 | Solar (×3, same day) | not stated |
| Apr 20, 2026 | Solar (×3, same day) | not stated |
| Apr 13, 2026 | Solar | not stated |
| Jul 22, 2025 | ADUADU NAVAJO: Combination building permit for a proposed (N) detached ADU to an (E) SDU. Proposed ADU… | $94,598 |
| May 23, 2025 | AdditionADU CLAIREMONT MESA ; Combination Building Permit for a proposed 2nd story ADU addition to the… | $239,559 |
| May 23, 2025 | ADUADU CLAIREMONT MESA ; Combination Building Permit for a proposed 2nd story ADU addition to the… | $239,559 |
| Nov 20, 2024 | ADUADU NAVAJO; Combination building permit for proposed new attached ADU at an existing SDU. Work to… | $228,128 |
| Sep 11, 2024 | ADUADU MISSION VALLEY, SERRA MESA; Combination permit to convert existing detached garage in to new… | $126,991 |
| Aug 29, 2024 | ADUADU MID-CITY: EASTERN AREA; Combination Building Permit; For the proposed attached ADU including 2… | $177,598 |
| Jun 14, 2024 | ADUADU MID-CITY:KENSINGTON-TALMADGE; Building permit for convert (e) detached 4 car garage to (2)… | $76,912 |
| Jun 5, 2024 | ADUADU CLAIREMONT MESA: Combination building permit for the addition of an ADU above an existing… | $130,665 |
| Apr 4, 2024 | ADUADU SKYLINE-PARADISE HILLS: Combination Building permit for a new Detached ADU on the lot of an… | $147,442 |
| Mar 29, 2024 | ADUADU MID-CITY:CITY HEIGHTS; Combination building permit for proposed conversion of existing detached… | $58,536 |
| Mar 18, 2024 | ADUADU *** SCOPE CHANGE 1/23/24*** MID-CITY:CITY HEIGHTS: Combination building permit for the… | $61,108 |
| Aug 10, 2023 | ADUADU NORTH PARK: Combination Building Permit for the proposed new detached ADU on the rear of the… | $27,280 |
| Aug 10, 2023 | ADUADU NORTH PARK: Combination Building Permit for the proposed new detached ADU on the rear of the… | $100,238 |
What to ask before you hire
About Spearhead Construction
- Ask for the license number and check it with the state.
- Ask what the warranty covers and for how long, in writing.
- Search their name on the Better Business Bureau site, and read their reviews.
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 Spearhead Construction
Five quick questions. We pass your request to Spearhead Construction.
Request for Spearhead Construction
- Where
- Job
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- Goes to
You decide who to hire. Your details go only to the contractors you pick. How we use your details
Sent. We have your request.
We pass it to Spearhead Construction. Replies usually come within a few days.
Your job room keeps the request, your photos and every reply in one place, with an assistant that checks prices against city permits. Keep its link: it is the key to your job.
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Run this business? Claim this page to get requests by email and reply to homeowners here.