Di & Zu Construction Inc
Solar installer working in Riverside.
- Riverside publishes no contractor license list we can check
23 jobs on Riverside permits, 2024 to 2026: 8 ADUs, 8 solar installations, 7 panel upgrades. 68th most solar system permits of 161 contractors in Riverside.
What the public records show
From the city's permits, one question at a time.
| Question | Records show | Mark |
|---|---|---|
| Licensed? | Riverside publishes no contractor license list we can checkThat says nothing about this business either way. | Ask them |
| Jobs on record | 23 jobs on Riverside permits, 2024 to 2026: 8 ADUs, 8 solar installations, 7 panel upgrades68th most solar system permits of 161 contractors in Riverside. That counts jobs, not quality.Our Riverside permit records cover September 2021 to September 2026. |
Records: City of Riverside permits.
Cost and timing
All solar system jobs in Riverside: $11,000 to $31,000
Half of 3,569 city permits list an amount in this range. Permit amounts are often lower than what you pay.
- Solar with a battery in Riverside: $22,000 to $47,000 (137 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 $159,426 (half list more, half less)
That is the figure written on the permit form, which can be far from what you pay. Kitchen jobs alone: typical permit $120,048 (7 permits, a small sample). What solar system jobs cost in Riverside.
Get 2 or 3 written quotes.
Track record
2 jobs in the last 12 months, down from 21 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 |
|---|---|---|
| Feb 18, 2026 | Panel upgrade (×2, same day)Install new electrical service panel | $2,000 each |
| Sep 15, 2025 | ADU | $200,000 |
| Sep 15, 2025 | Solar | $200,000 |
| May 1, 2025 | Panel upgradeUpgrade and relocate electric service meter upgrade to 200 amp dual meter, 100 amps adu, 100 amps… | $3,000 |
| May 1, 2025 | Panel upgradeElectric service upgrade to dual gang meter panel to 200 amps, 100 amps adu, 100 amps main house … | $3,000 |
| May 1, 2025 | Panel upgradeUpgrade and relocate electric service meter upgrade to 200 amps side by side, 100 amps adu, 100… | $3,000 |
| May 1, 2025 | Panel upgradeRevised 8/06/25: install 100 amp panel next to an existing 100 amp panel - combined loads of 200… | $3,000 |
| May 1, 2025 | Panel upgradeInstall and relocate new electrical panel side by side 200 amps 100 amps to main residence and 100… | $3,000 |
| Jan 9, 2025 | ADUNew detached adu - 1200 sf: 3 bedrooms, 3 bathrooms, kitchen, living room **work by separate… | $111,672 |
| Jan 9, 2025 | SolarNew detached adu - 1200 sf: 3 bedrooms, 3 bathrooms, kitchen, living room **work by separate… | $111,672 |
| Oct 16, 2024 | ADUNew detached adu - 1000 sf kitchen, 3 bedrooms, 2 bathrooms, living area, laundry *** pv solar… | $111,672 |
| Oct 16, 2024 | SolarNew detached adu - 1000 sf kitchen, 3 bedrooms, 2 bathrooms, living area, laundry *** pv solar… | $111,672 |
| Oct 16, 2024 | ADUNew detached 1000 sf adu 3 bedroom/2 bathroom/ kitchen/ living area **pv solar by separate plan… | $100,040 |
| Oct 16, 2024 | SolarNew detached 1000 sf adu 3 bedroom/2 bathroom/ kitchen/ living area **pv solar by separate plan… | $100,040 |
| Oct 16, 2024 | ADUNew detached adu - 1200 sf 3 bedrooms, 3 bathrooms, kitchen, living room ***any electrical panel… | $198,804 |
| Oct 16, 2024 | SolarNew detached adu - 1200 sf 3 bedrooms, 3 bathrooms, kitchen, living room ***any electrical panel… | $198,804 |
| Oct 16, 2024 | ADU | $200,844 |
| Oct 16, 2024 | Solar | $200,844 |
| Oct 16, 2024 | ADURevised 12/18/25: (n) detached adu with (3) bedrooms & (2) bathrooms - 1200 sf (n) detached adu… | $198,804 |
| Oct 16, 2024 | SolarRevised 12/18/25: (n) detached adu with (3) bedrooms & (2) bathrooms - 1200 sf (n) detached adu… | $198,804 |
| Oct 16, 2024 | ADUNew detached adu - 1200 sf kitchen, living room, 3 bedrooms, 3 bathrooms 1/21/26 revision:… | $120,048 |
| Oct 16, 2024 | SolarNew detached adu - 1200 sf kitchen, living room, 3 bedrooms, 3 bathrooms 1/21/26 revision:… | $120,048 |
What to ask before you hire
About Di & Zu Construction Inc
- Ask for their 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 solar installer
- Can you show me proof of liability insurance and your bond?
- What size system, which panels and inverter, and what will it make in a year?
- Is my roof good for 25 more years, and what if it needs work first?
- Who handles the permit and the utility's approval to turn it on?
Get a quote from Di & Zu Construction Inc
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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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