The Supplementary Code Allocation Appraisal Report (Form RP-961) is a Natural Resources report published by the Los Angeles County Office of the Assessor. It is one of the forms the Assessor lists for Los Angeles County property tax purposes, and it collects pipeline changes, water plant changes, the number of services and meters, and fire hydrants for a water system. On this page you can fill out the form online on FillingPDF and download or print the completed PDF; the form itself is published by the Assessor at assessor.lacounty.gov/forms.
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What is RP-961?
Form RP-961, Supplementary Code Allocation Appraisal Report, is a Natural Resources report of the Los Angeles County Office of the Assessor on which a water system's pipeline changes, water plant changes, services, meters and fire hydrants are listed by code area and tract.
The form has four blocks after the name and address section:
- Pipeline Changes: abandonments, replacements and additions since January 1 of last year, listed by code area, tract, size, kind, year laid and feet.
- Water Plant Changes: changes to pumping plants, wells, tanks, reservoirs, chlorinators and similar facilities.
- Services and Meters: the total number of services and meters in place, grouped as commercial, irrigation, industrial and domestic. The form defines a service as a connection off the main line.
- Fire Hydrants: the number of hydrants by service size, with rows for 4-inch and 6-inch.
A Remarks area closes the form. Each list is to be typed or printed, and the form says to write NONE where nothing applies.
The Assessor's forms page lists RP-961 together with other water, pipeline and utility statements, among them RP-962, Utility Water Company Property Statement, BOE-540-S, Mutual or Private Water Company Property Statement, and BOE-571-P, Pipeline Property Statement. RP-961 is a separate report with its own content.
Who needs to file RP-961?
The form is built for the party that reports on a water system: it asks for a name, street and mailing address and phone number, and then for the system's pipelines, water plant facilities, services, meters and fire hydrants. The printed form does not say who is required to file it, so confirm with the Los Angeles County Office of the Assessor whether it applies to you.
You would typically work with it if you can supply the system's facts the form asks for:
- changes to pipelines since January 1 of last year, by code area and tract;
- changes to pumping plants, wells, tanks, reservoirs, chlorinators and similar facilities;
- the total number of services and meters in place in the water system, by commercial, irrigation, industrial and domestic use;
- the number of 4-inch and 6-inch fire hydrant services.
The form gives no rules about who may sign or file on someone else's behalf, and it has no signature block.
When to file RP-961
The form covers a defined period rather than a printed due date: the Pipeline Changes section asks you to list abandonments, replacements and additions since January 1 of last year. Have those records ready before you start, and write NONE where there were no changes.
No filing deadline is printed on Form RP-961 (Rev. 10-25). For the date by which the Los Angeles County Office of the Assessor expects the report, check with the Assessor through its forms page at https://assessor.lacounty.gov/forms.
How to fill out RP-961
Enter name and addresses
At the top, write the Name, Street Address, Mailing Address, City and Phone No.
List pipeline changes
Under Pipeline Changes, list each abandonment, replacement and addition since January 1 of last year. For each row give the code, area, tract, size, kind, year laid and feet; write NONE if there were none.
Give street locations if needed
Where a tract description is not available, enter the street locations in the Tract column, as the form's note instructs.
Report water plant changes
Under Water Plant Changes, list changes to pumping plants, wells, tanks, reservoirs, chlorinators and similar facilities; write NONE if that applies.
Complete commercial, irrigation and industrial
In Services and Meters, enter for each group the code, tract, area, number of services and the meter size and number. Give the total number in place in the water system.
Complete the domestic section
Under Domestic, enter the code, tract, area, services and the meter size and number in the same way. Remember that a service is a connection off the main line.
Enter fire hydrants
In Fire Hydrants, enter the number for the 4-inch and 6-inch service sizes.
Add remarks
Use REMARKS for any explanation needed for the entries above.
Review and download the completed PDF
Check that every list is filled or marked NONE, then download or print the completed PDF from FillingPDF and send it as described under How to submit.
How to submit RP-961
Form RP-961 prints no mailing address, portal or appointment rule, so the submission channel comes from the Los Angeles County Office of the Assessor, which publishes the form at https://assessor.lacounty.gov/forms.
- Complete the form: the form asks that entries be typed or printed.
- Confirm the channel: contact the Assessor to confirm where and how to send the completed report before you submit it.
- Keep a copy: retain a copy of the completed report for your records.
FillingPDF lets you fill out and download the PDF; submission follows the channels above.
Common mistakes to avoid
- Leaving a section blank instead of writing NONE; the form says to list NONE where a list does not apply.
- Listing pipeline changes only for the current year; the form asks for abandonments, replacements and additions since January 1 of last year.
- Entering only new services or meters instead of the total number in place in the water system, as the Services and Meters section directs.
- Counting a main line as a service; the form defines a service as a connection off the main line.
- Omitting street locations when a tract description is not available, which the form's note asks you to give.
- Leaving out water plant facilities such as wells, tanks, reservoirs or chlorinators, which the Water Plant Changes section covers.
- Splitting the fire hydrant count by the wrong size; the form has separate rows for 4-inch and 6-inch services.
- Handwriting entries that cannot be read; the form says to type or print.
Frequently asked questions
What is Form RP-961?
Form RP-961, Supplementary Code Allocation Appraisal Report, is a Natural Resources report of the Los Angeles County Office of the Assessor. It lists a water system's pipeline changes, water plant changes, services, meters and fire hydrants by code area and tract.
What period do the pipeline changes cover?
Abandonments, replacements and additions since January 1 of last year. The form says to list NONE if that applies, so a section with no changes is still completed rather than left empty.
What counts as a service on Form RP-961?
The form defines a service as a connection off the main line. In the Services and Meters section you give the total number of services and meters in place in the water system, not only new ones.
What does the Water Plant Changes section cover?
It refers to pumping plants, wells, tanks, reservoirs, chlorinators and similar facilities. List the changes there, and write NONE if that applies.
Can I fill out Form RP-961 online?
Yes. You can fill out the PDF online on FillingPDF and download or print it. FillingPDF is an independent service and does not send the report to the Assessor; you submit it through the Assessor's channels.
What fire hydrant information does the form ask for?
The Fire Hydrants section has rows for 4-inch and 6-inch service sizes, each with a number. Enter how many hydrants fall under each size.
Where do I get the latest Form RP-961?
The Los Angeles County Office of the Assessor lists it on its forms page at https://assessor.lacounty.gov/forms as RP-961, Supplementary Code Allocation Appraisal Report. The version on this page is marked Rev. 10-25.
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