One expired permit can shut your whole site.

The Osogbo urban area of Osun State: Osogbo and Olorunda local government areas. Both, because the city physically spans them - Olorunda's headquarters sits inside Osogbo city, so a site with an Osogbo address may legally fall under Olorunda and take its building plan approval from Olorunda Local Government. A document from any other state or local government is failed, not warned.

No. The model transcribes the document, classifies it and pulls out eight fields. Pass, Warning and Fail are then computed by deterministic rules in code, with no model in the path - so the same fields always produce the same verdict, and every verdict can be traced to the rule that produced it. That split is deliberate: compliance decisions have to be auditable and reproducible.

A phone photo, a JPG or PNG, or a PDF that has a real text layer - up to 10 MB. A scanned PDF is pages of pixels with no text in them, so there is nothing to read; photograph the document or re-export it as a JPG and upload that instead. You will get a message telling you which of these happened.

Yes. A nightly sweep re-checks every document that carries an expiry date and emails the workspace owner when one crosses a threshold: 90 days out is a renewal warning, 30 days is urgent, and past the date is a failure. You get one email per transition rather than a daily reminder, and renewing a document silently resets it. Expiry is also judged on upload, so a certificate that is already close to lapsing is flagged the moment it arrives.

No, and that is a deliberate boundary rather than a gap. DocuCheck verifies documentary compliance: that the required documents exist, came from the authority entitled to issue them, are still valid, and agree with each other. It assumes the documents put in front of it are genuine — exactly as a compliance officer does when a contractor hands over a certificate. Confirming authenticity would mean checking against the issuing registry itself, such as the Osun lands registry or COREN's membership database, which is future work.

It tells you the building was taken through the right process — that the permits, approvals and certificates the regulator requires were obtained, from the right bodies, and are still valid. That is different from whether the structure itself was built well. Concrete, reinforcement, setbacks and workmanship are matters for physical inspection, and DocuCheck neither sees nor claims to judge them.

Because for some documents nobody could tell us who the issuer should be. The Osun State Ministry's published permit procedure ends at building plan approval - it contains no completion inspection and no occupancy certificate - so for four post-construction document types no issuing body could be confirmed from an official source. Rather than invent one, the check reports the gap. A fabricated authority would make the check confidently wrong, which is worse than an honest warning.

No. It reads text, so from a building plan it gets the title block, the annotations and the schedule tables. The drawing itself is geometry, and the system does not measure geometry - nor does it hold Osun's development control standards to measure against. It verifies documentary compliance, not physical or design compliance. Those are different problems.

Workspaces are isolated in the database by row-level security, enforced in Postgres rather than in application code, so a signed-in user can only read projects, documents, alerts and audit logs belonging to a workspace they are a member of. There are two roles - an owner, created when you sign up, who manages members, and members, who can create projects, upload documents and generate reports. There is no global administrator with access across workspaces.