Neighborhood investigations are back — which part of an N-400 gets slower

Last updated 2026-09-28 · General information, not legal advice

USCIS issued a policy alert on 25 August 2026 reviving the neighborhood investigation on naturalisation applications. Officers may interview people where you live and where you work, over a span covering at least the five years before you filed the Form N-400. The Policy Manual says the investigation is generally conducted and completed before the interview is scheduled, which puts it in the stretch between filing and an interview date. The 120 days that 8 U.S.C. § 1447(b) gives you still start on the day of the examination.

What USCIS changed

The alert is called "Investigations and Examinations for Naturalization Eligibility" and it rewrites Chapter 2 of Volume 12, Part B of the Policy Manual, "Background Investigation and Security Checks". The chapter text now carries a currency date of 23 September 2026. (12 USCIS-PM B.2, uscis.gov; Policy Manual updates)

What the investigation covers. In the manual's own words, a neighborhood investigation under INA § 335(a) includes conducting witness interviews to gather information about a person's conduct, residence, reputation and community ties. The chapter sets the reach of that enquiry at a minimum of the five years immediately preceding the filing of the application.

When it happens. The manual states that the neighborhood investigation applies to all applicants and will generally be conducted and completed before the applicant is scheduled for the naturalisation interview. The interview is scheduled after the investigation is done, so the stretch that grows is the one before the interview.

It can be waived. USCIS may waive the investigation where it decides a waiver is appropriate in a particular case or in classes of cases. The manual then names something an applicant can do about it: submitting at least two character reference letters with the Form N-400 can assist USCIS in deciding whether a waiver is appropriate.

The authority is not new. Under 8 U.S.C. § 1446(a), before a person may be naturalised a designated employee shall conduct a personal investigation in the vicinities where that person has kept an actual place of abode and has been employed or in business for at least the five years immediately preceding the filing of the application; the same subsection allows a discretionary waiver in an individual case or in designated classes of cases. (8 U.S.C. § 1446, govinfo.gov) At regulation level, 8 C.F.R. § 335.1 requires an investigation consisting at a minimum of a review of all pertinent records, police department checks and a neighborhood investigation in those same vicinities, and it lets the district director waive the neighborhood part. (8 C.F.R. § 335.1, govinfo.gov) Both texts have sat there for decades; what changed in August 2026 is how often USCIS waives the investigation.

No published figure for the extra time. The chapter puts no duration on an investigation and no deadline on scheduling the interview that follows it.

What this means for a delay case

An N-400 can stall in two places, and the law treats them differently. This change lands entirely in the first one.

Filing to interview runs on the ordinary mandamus route. No statute gives USCIS a deadline here, so a court asks whether the wait has become unreasonable, under 28 U.S.C. § 1361, 5 U.S.C. § 555(b) and § 706(1). The processing times USCIS publishes are the figures both sides reach for. On the data published 17 September 2026, N-400 timing varies sharply by office: New York City clears 80% of cases in 10 months with the case-inquiry line at 12.5 months; Los Angeles sits at 10.5 and 14 months; San Francisco at 14.5 and 22.5; San Jose at 16 and 31.5, meaning that on 26 September 2026 only receipts dated before 13 February 2024 could open an inquiry at that office. Your own two numbers are on the processing-time tables.

One gate already stood in front of the interview. Under 8 C.F.R. § 335.2(b), USCIS notifies an applicant to appear for the initial examination only after it has a definitive response from the FBI that a full criminal background check has been completed. (8 C.F.R. § 335.2, govinfo.gov) There is now a second thing to finish before a date can be set.

Interview to decision: the 120 days start where they always did. Under 8 U.S.C. § 1447(b), where there is a failure to make a determination within 120 days after the date on which the examination under § 1446 is conducted, the applicant may apply to the district court for the district in which the applicant resides; that court has jurisdiction and may either determine the matter itself or remand it to the agency with instructions. (8 U.S.C. § 1447, govinfo.gov) The regulation says the same thing from the agency's side: 8 C.F.R. § 335.3(a) requires the decision to grant or deny to be made at the time of the initial examination or within 120 days after it. (8 C.F.R. § 335.3, govinfo.gov)

The investigation and the examination are separate items in those texts. The investigation lives in § 1446(a) and 8 C.F.R. § 335.1; the examination lives in § 1446(b) and 8 C.F.R. § 335.2. The 120 days are tied to the second. On the sequence USCIS has written for itself, a neighborhood investigation is finished before the interview, at a point when the 120 days have not begun to run.

An investigation opened after the interview. The guidance says "generally" completed beforehand, which does not rule out one being run later. If that happens, nothing in the text of § 1447(b) or 8 C.F.R. § 335.3(a) suspends the period — both fix it to the date of the examination. How a court handles it is a separate question, and district courts have not read the point the same way. That is ground for a lawyer who has read your file. The route itself is set out on N-400 interview done, still no decision.

An extra step does not make the wait reasonable by itself. The unreasonable-delay analysis looks at what the agency did with the file and how long it held it. Adding a stage to the process does not convert the resulting months into reasonable ones. The seven signs a case is worth filing apply as they did before.

What to do

1. If the N-400 has not gone in yet, send the letters with it. The manual names this: at least two character reference letters filed with the application can help USCIS decide whether to waive the investigation.
2. If you are waiting on an interview, look up your field office. Each row of the processing-time tables carries two numbers — the 80% normal range and the line at which a case inquiry opens. Until your receipt date clears the second one, the website gives you no way to ask.
3. Two free channels stay open. The case inquiry on the USCIS website, and the congressional office for your district, which staffs caseworkers for immigration matters at no cost to constituents. The CIS Ombudsman takes requests as well. Checking your own case status on the USCIS website is always free.
4. If the interview is done, keep the paper that proves the date. The date on the interview notice (Form I-797C), anything you signed that day, anything handed to you. The 120 days count from there, not from the receipt date.
5. Neighbours being contacted does not by itself mean something is wrong with your case. The manual describes the investigation as applying to all applicants, with waivers decided case by case.

If you are not sure where your case sits, the 60-second check works it out from your receipt date.