Val-d’Oise remand prison, Osny

The Val-d’Oise remand prison in Osny holds people remanded in custody by the Pontoise court. Here is how to visit a relative there.

Is a relative detained at Osny? Barssie Avocats visits clients in prison and appears before the investigating judge, the investigation appeals chamber and the sentence enforcement judge. +33 7 75 72 74 27, available 24/7. We speak English.

Overview

The Osny prison holds adult men on remand or serving short sentences. Cases are mainly handled by the Pontoise court and the Versailles court of appeal.

Address and access

Maison d’arrêt du Val-d’Oise
RD 927, Chemin Vert, 95520 Osny
Switchboard: +33 1 34 25 47 47

Bus: line 35, from Pontoise, Cergy-le-Haut or Cergy Saint-Christophe.
By car: visitor car park.

Visiting a relative

1. The visiting permit

No visit is possible without a permit (permis de visite). For a person on remand (not yet finally convicted), the request is made to the judge in charge of the case; for a convicted person, to the prison governor. The documents to provide are listed in our guide to prisons in France.

2. Booking a visit

Book on +33 805 050 062, Tuesday to Friday 9 am–12 noon.

Visits take place on Monday afternoon and Tuesday to Saturday, morning and afternoon. Families are called about twenty minutes before each session:

call 8 am, entry 8.30 am;
call 9.30 am, entry 9.50 am;
call 1 pm, entry 1.20 pm;
call 2.20 pm, entry 2.40 pm;
call 3.50 pm, entry 4.10 pm.

Remand prisoners may receive three visits a week, convicted prisoners two.

3. Dropping off clothes

The prison explains how to drop off clothes when you book.

4. Getting support

The official page does not mention a family support association at Osny. The firm can point you in the right direction.

What a lawyer can do

The lawyer meets your relative in the lawyers’ visiting room, confidentially, without a visiting permit and without limits on frequency. At Osny, the lawyer mainly appears before the Pontoise court.

Pre-trial detention: application for release, if necessary under judicial supervision or electronic tagging; appeal before the investigation appeals chamber; challenge to a refused visiting permit.
After conviction: sentence adjustment (electronic tagging at home, day release, parole), temporary leave.
During detention: assistance before the disciplinary board, challenge to a sanction, transfer or solitary confinement.
Foreign nationals: liaison with the family abroad and the consulate, transfer requests where possible.

The firm visits clients at Osny. For an initial assessment of your relative’s situation: +33 7 75 72 74 27, 24/7, or contact@barssie-avocats.com.

Frequently asked questions

How many visits per week? Three for a remand prisoner, two for a convicted prisoner.

When should I arrive? At the call time, about twenty minutes before entry.

Which court handles the case? Most often the Pontoise court.

Practical information taken from the official page of the prison in October 2026. Times can change: check before you travel.

See also: all prisons · Nanterre · Villepinte