San Mateo County, California
Gutter cleaning, repair and new gutters in Half Moon Bay, CA
Half Moon Bay gets about 26 inches of rain in a normal year, and on about 6 days a year an inch or more falls in a single day. The wettest season is winter (December to February), with about 15.0 inches; the driest is summer (June to August), with 0.7. Every 1,000 square feet of roof sheds about 16,100 gallons a year, and all of it goes through the gutters.
Call (866) 228-6229 free call to a gutter contractor serving Half Moon BayHalf Moon Bay: rain and roofs
NOAA station USC00043714, 0 miBars to one scale; the longest is winter (December to February).
For days with an inch of rain or more, Half Moon Bay ranks near the middle of the 939 places in California on this site (5.5 a year). By the age of its homes it sits near the middle of the 938 places in California on this site (half built by 1982).
When to clean gutters in Half Moon Bay
Frost is rare in Half Moon Bay, and in many years there is none (NOAA normals). With no hard freeze to strip the trees, the fall cleaning follows the leaf drop itself; book it once the trees over the roof are bare, and plan a second visit in spring.
When to clean gutters explains how the trees over a roof change the schedule.
Gutter and downspout size for Half Moon Bay rain
What overwhelms a gutter is a burst, not a season. In Half Moon Bay the five-minute rain expected about once in ten years falls at 2.92 inches an hour (NOAA Atlas 14 Volume 6). At that rate one 2-by-3-inch downspout drains about 2,470 square feet of roof and one 3-by-4-inch downspout about 4,930, by the rule in the Copper Development Association’s design handbook. Try your own roof in the gutter and downspout calculator, which starts from this figure.
The houses in Half Moon Bay
Half the homes in Half Moon Bay were built by 1982, 47% before 1980 (ACS 2020–2024). In a neighborhood that age, many houses are on their second set of gutters or due for one, and the fascia board behind them is worth checking at the same visit. On a house built before 1978, replacing more than 20 square feet of painted fascia or trim falls under the EPA’s lead-safe rule, so ask whether the crew is certified.
73% of households own their home, and 68% of homes are detached houses, 10% townhouses. Where an HOA governs the exterior, its rules on gutter color and style apply before any order is placed.
Hiring in California
Before hiring in Half Moon Bay, ask which California license or registration the contractor holds and for a certificate of liability insurance. Hiring a gutter contractor
In California’s fire hazard severity zones, the 2025 Wildland-Urban Interface Code (in force January 1, 2026) requires gutters and downspouts of noncombustible material, and gutters fitted with an approved means to keep leaves and debris from collecting (section 504.4). (2025 California Wildland-Urban Interface Code, Chapter 5 (UpCodes))
Gutter work in Half Moon Bay
With half the homes built by 1982, replacement gutters and the fascia behind them come up more often here than in newer suburbs. The line takes all of it: