Complete Document Package for Selling an Apartment in 2026 — A Step-by-Step Guide

The minimum package a notary needs to process the deal

Passport and tax ID of all owners, the original title document (sale contract, deed of gift, inheritance certificate, or court decision), the BTI technical passport, a certificate of registered residents (no older than 10 days at the time of the deal), and certificates confirming no utility debts.

When extra documents are needed

If the apartment was purchased while married, you'll need the other spouse's written consent (or their personal presence at closing). If any owner is a minor, guardianship authority approval is required. Each of these adds 1–3 weeks to document collection if you don't start early.

What's included in the paid package

We build a personal checklist for your exact case (ownership type, minors involved, marital status), prepare request templates for the housing office and BTI that save you visits and queues, and support you through document collection until you're ready to close.