21 roofing listings are recorded at Castro Valley, California addresses. None of them has a Google rating matched to it yet, so what follows is contact detail rather than reputation data.
All of them are recorded in Alameda County. Roofing permits and inspections are issued locally rather than by the state, so a re-roof in Castro Valley goes through Alameda County or the municipality's own building department, whichever holds jurisdiction at the property.
All Listings in Castro Valley
21 listings
Licensing for roofers working in Castro Valley
California licenses roofing contractors at state level, and the requirement applies to work in Castro Valley. The licence is issued by the Contractors State License Board.
A state licence is not a substitute for local rules: the job still needs a permit and an inspection through Alameda County or the city, and some municipalities require their own contractor registration on top of the state licence.
Source: Contractors State License Board. Checked August 2026. Licensing rules change — verify before you sign anything.
What roofing work costs
We have not modelled a cost index for Castro Valley, so there is no Castro Valley figure here. These are the national baseline bands, unadjusted.
National reference bands, not quotes and not local numbers. Local labor rates, permit fees and access all move them.
All roofing cost guidesOther Alameda County towns with listings
Same county, same inspections department, same code — these are the other Alameda County places this directory has roofers for.
Work out the job before you call
Storm history in Alameda County
Castro Valley has no weather record of its own — NOAA records severe weather against counties, and the listings on this page put Castro Valley in Alameda County. These are weather records for the whole county, not an assessment of any building in Castro Valley.
NOAA's Storm Events Database holds 22 severe-weather events recorded against Alameda County between 2016 and 2026: 19 hail reports and 3 thunderstorm wind events.
All 19 hail reports carrying a measured size were under 1.00 in across. The largest on record is 0.25 in (Pea) on January 22, 2017.
The strongest wind gust in the record is 51 kt (about 59 mph), a measured gust, on December 14, 2024.
The busiest complete year in the record is 2018, with 11 events.
Events on record
22
2016–2026
Largest hail
0.25 in
Pea · January 22, 2017
Peak gust
51 kt
about 59 mph · December 14, 2024
Events recorded per year
- 2016
- 0
- 2017
- 3
- 2018
- 11
- 2019
- 2
- 2020
- 3
- 2021
- 1
- 2022
- 0
- 2023
- 0
- 2024
- 2
- 2025
- 0
- 2026*
- 0
* The most recent data year is partial. NOAA publishes storm reports on a rolling basis and the final months are still being processed, so a low count in the last year is not evidence of a quiet year. The curated archive behind these counts runs through May 31, 2026; anything later sits in the preliminary block below.
Notable events in the archive
- Dec 14, 2024 -- Thunderstorm Wind (51 kt gust)
- Apr 7, 2017 -- Thunderstorm Wind (38 kt gust) -- $10K property damage reported
- Jan 22, 2017 -- Hail (Pea hail, 0.25 in) -- $10 property damage reported
- Jan 19, 2017 -- Hail (Pea hail, 0.25 in) -- $5.00M property damage reported
Selected by the dataset’s own rule rather than by editorial choice: the largest hail, the peak wind gust, the strongest tornado and the two costliest events by recorded property damage, deduplicated and newest first. Any dollar figure above is NOAA’s recorded estimate for that one event.
What these counts cover. County figures count events NOAA recorded against a county (hail, thunderstorm wind and tornadoes). High wind, winter storms, ice storms, blizzards, heavy snow, hurricanes and tropical storms are recorded against National Weather Service forecast zones rather than counties, so they are reported at state level instead. Counts reflect events that were observed and reported.
The damage figure. $5,010,020 is the sum of NOAA’s recorded property-damage estimates across every event in Alameda County over the period — a county total, not a figure for any one property, any one building or any one claim. NOAA records these figures as estimates made at the time of reporting. They are not adjusted for inflation, and they are frequently absent or zero — a zero means nothing was recorded, not that nothing was damaged.
Source. Archived figures come from the NOAA National Centers for Environmental Information Storm Events Database, covering 2016 through May 31, 2026. Anything after that date comes from NOAA Storm Prediction Center preliminary storm reports and is labelled preliminary wherever it appears. Both are US Government works in the public domain.