Photo: Photo by Joe Mabel · CC BY-SA 4.0Living in Cottage Lake, WA: what to set up and who to call
Cottage Lake has no town government of its own, so King County runs its elections and most services, and its children attend Northshore School District. Most of Cottage Lake has one wired internet choice: Xfinity.
I’m new in town
What to set up in Cottage Lake, and who provides it. Tap an answer for the details and where they come from.
Power, water and internet
Who to call to start service at a new address in Cottage Lake.
Power comes from Puget Sound Energy
Puget Sound Energy (Puget Sound Energy Inc), an investor-owned utility, serves all of Cottage Lake. Its homes paid an average of 17.0¢ per kWh in 2025, about $147 a month (its average across Washington).
Start or move service: pse.com · (888) 225-5773
Service territory: HIFLD Electric Retail Service Territories (map dated Aug 2023). Prices and customers: EIA-861, 2025.
Water comes from Woodinville Water District
Woodinville Water District supplies almost all of Cottage Lake. It buys treated surface water (EPA lists City of Bothell Water and Cross Valley Water District and Northshore Utility District and City of Redmond Water System and Seattle Public Utilities as sellers) and serves 66,699 people in all.
No health-based violations reported to EPA in the five years to October 2026, like 90% of the 597 systems serving 50,001–100,000 people.
The system’s full record: EPA ECHO report
EPA SDWIS via Envirofacts (violations pulled Oct 9, 2026) and ECHO (lead samples, 2026Q3); service area: EPA Community Water System Service Area Boundaries v3.0. Violations are counted by the start of their compliance period. WA5341600.
6 home internet providers serve Cottage Lake
99% of 8,066 addresses can get 100/20 Mbps; 23% can get fiber.
| Provider | Technology | Addresses | Fastest (Mbps) |
|---|---|---|---|
| Xfinity | Cable | 93% | 2,000/250 |
| Ziply Fiber | Fiber, DSL | 24% | 6,000/6,000 |
| Astound Broadband | Cable | 4% | 1,500/50 |
| Verizon | Fixed wireless | 50% | 300/20 |
| AT&T | Fixed wireless | 41% | 25/3 |
| T-Mobile | Fixed wireless | 39% | 100/20 |
FCC National Broadband Map, as of December 2025. Availability as providers report it, not speeds people get.
We don’t have Cottage Lake’s trash rules yet
Pickup rules, the dump and recycling in Cottage Lake.
Where your child goes to school
Public school districts and the school path by grade.
Most of Cottage Lake (81%) is in Northshore School District; parts are in Lake Washington School District (13%) and Riverview School District (6%).
A+School gradeSee Schools →U.S. Department of Education, NCES Common Core of Data, 2024–25. Enrollment rules and registration are the district’s.
No town hall: the county runs things
Cottage Lake is unincorporated, so King County is the local government.
Election office: FVAP local election office directory, updated Sep 2021; jurisdictions: EAC EAVS 2024. Registration rules and links: vote.gov, updated Sep 30, 2026.
Cottage Lake spans 3 ZIP codes
ZIP codes where Cottage Lake residents live, with the share of the town in each.
| ZIP | Post office name | Share of Cottage Lake | ZIP’s residents in Cottage Lake |
|---|---|---|---|
| 98077 | Woodinville, WA | 48% | 82% |
| 98072 | Woodinville, WA | 36% | 33% |
| 98052 | Redmond, WA | 15% | 5% |
A few homes fall in 98019.
Census 2020 ZIP Code Tabulation Areas, by census block; post office names: GeoNames (CC BY 4.0). ZIPs created since 2020 are missing.
Getting around, the ER and the library
One line each; the subject pages have the rest.
ER: CMS hospital data. Library: IMLS Public Libraries Survey, FY2024.
Questions about living in Cottage Lake
Who supplies Cottage Lake’s drinking water, and has it had violations?
Woodinville Water District (EPA ID WA5341600). It reported no health-based violations to EPA in the five years to October 2026; 90% of systems its size had none.
Who provides electricity in Cottage Lake?
Puget Sound Energy (Puget Sound Energy Inc), an investor-owned utility. Its homes paid about 17.0¢ per kWh in 2025 (EIA).
What internet providers serve Cottage Lake?
Xfinity, Ziply Fiber, Astound Broadband, Verizon, AT&T, T-Mobile (FCC, as of December 2025).
What ZIP codes are in Cottage Lake?
98077 (48%), 98072 (36%), 98052 (15%), by share of residents. Census 2020 ZIP Code Tabulation Areas.
What school district is Cottage Lake in?
Northshore School District. Parts of the city are in Lake Washington School District and Riverview School District.
How do I register to vote in Cottage Lake?
In Washington you can register online until 8 days before Election Day, in person up to and including Election Day, or by mail (received 8 days before). Elections here are run by the King County Elections. Check your registration at voter.votewa.gov.
Sources & dates
Every answer above names its source. Here they are with their dates.
- Water: EPA SDWIS (Envirofacts, pulled Oct 9, 2026), ECHO SDWA 2026Q3, EPA CWS Service Area Boundaries v3.0.
- Power: HIFLD Electric Retail Service Territories (map Aug 2023); EIA-861 final 2025.
- Trash: OpenStreetMap, Geofabrik extract of Oct 9, 2026. © OpenStreetMap contributors (ODbL).
- ZIP codes: Census 2020 ZCTA relationship files; GeoNames postal codes (CC BY 4.0).
- Schools: NCES Common Core of Data, 2024–25.
- Registration: vote.gov, updated Sep 30, 2026 (read Oct 10, 2026). Official sites and area codes: Wikidata.
- Election office: FVAP local election office directory (fetched Oct 10, 2026; each record dated), EAC EAVS 2024 jurisdictions; registration and lookup links from vote.gov’s state data, checked Oct 10, 2026.
- Internet: FCC National Broadband Map, as of December 2025.