In Douglas County, Colorado, which covers Castle Rock, we have measured 15,267 parcels on septic and 80,932 on sewer. That is a county measurement. We do not hold a septic count for Castle Rock on its own and this page does not estimate one.
Castle Rock is a town in Douglas County, Colorado. The Census Bureau puts its internal point at 39.376194, -104.852922 and its land area at 34.74 square miles. Septic permitting and record keeping happen at the county level, not the town level, which is why every figure below is attributed to the county and linked back to the county page it came from.
| County | Records we hold | Parcels on septic | Parcels on sewer | County records portal | Searchable without an account |
|---|---|---|---|---|---|
| Douglas County | 14,690 | 15,267 | 80,932 | county portal | no account needed |
We hold 14,690 septic records for Douglas County, Colorado. That is a substantial partial collection rather than a complete one, so a Castle Rock property may or may not appear in it, and the county archive remains the authority. The county is predominantly sewered: only 15,267 of 96,199 classified parcels are on septic. Septic properties near Castle Rock are the exception, which is exactly why owners often do not know they have one. The county publishes a records portal that we were able to search without creating an account, which makes checking a specific parcel something you can do yourself in a few minutes.
Septic is one subject with very different jobs inside it. These go straight to the page that does yours.
| If you are a | Go to | Because it covers |
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No. We measure septic and sewer at parcel level and roll it up by county. In Douglas County, Colorado, which covers Castle Rock, we have measured 15,267 parcels on septic and 80,932 on sewer. That is a county measurement. We do not hold a septic count for Castle Rock on its own and this page does not estimate one.
Castle Rock is in Douglas County, Colorado.
From the Census ZCTA-to-place relationship file, with the share of Castle Rock’s land area that falls in each. A ZIP is not a place boundary and the two only ever partly agree, which is exactly why both pages exist.
Straight-line distance from the Census internal point of Castle Rock.
Parcel Perfect generates a code-shaped septic design and as-built style drawing for a parcel from the records and site data we hold, and shows every parcel we have classified as septic or sewer on one map. Both are open to use for any parcel in Douglas County, Colorado.