The parcel, not the mailing city

Which city, county, or district controls the job

The mailing address is not the permit counter, and it is not the sewer utility. These are the offices actually read for this guide. If your town is not on the list, its rules are not copied from Aurora.

Aurora permits through the city. Aurora Water: you keep the sewer to the tap and the water service to the main.
Centennial does not sell water or sewer. Districts do. The city reviews building permits.
Parker permits inside the town. The sanitation district's boundary is not settled here.
Highlands Ranch is unincorporated Douglas County.
Castle Rock has its own permits and Town water rules.
Lakewood has many districts. The city sewer graphic is the north side utility.
Arvada says you maintain the service line on your property. It does not give a right-of-way rule.
Englewood permits water heaters and water-line changes. A proposed ownership rewrite was not treated as current law.
Littleton sewer code includes the tap. Denver Water supplies drinking water.
Westminster says you keep the lateral to the city's main, including under a driveway.

A Census point within 50 straight-line miles is not a service area and not a utility. Towns missing from this list were not given Aurora's sentences.

Questions to settle first

My mail says Aurora. Am I in the city?

Not always. Confirm the parcel. Centennial, county land, and Aurora can share a postal name. The permit counter and the sewer bill are the proof. Using Aurora's tap rule on the wrong parcel bills the wrong party. Ask them to write that limit into the quote before you compare it with another company.

Who do I call for a sewer backup?

The utility on the sewer bill, and a plumber. Aurora Water's published backup number is 303-326-8645 for its system. Westminster collections is 303-658-2500 for its mains. Lakewood's city crew is only for the city's own north-side customers. Match the number to the bill.

Why isn't every suburb listed?

A place name is not a permit office. The cities on this page are ones where a city, a county, or a utility has published a rule that changes the job. A name on a map, by itself, does not tell you who permits the house.

Plumber working on pipes at construction site — **Diagnostic planning:** Accurate problem identification on residential piping prevents unnecessary digging and costly contractor mistakes.

Plumbing fittings, shutoff valves, and equipment layout — **Infrastructure standards:** Understanding city utility boundaries and code requirements ensures sound plumbing decisions for local properties.

Plumber repairing sink in bathroom with tool — **Fixture maintenance:** Aurora Water and regional building departments maintain clear standards for residential water and sewer lines.