Can I file a complaint if my building management changed without notice and is charging more?

What you should NOT do is just pay the new amount without putting your complaint on record, because afterward it's much harder to recover what you overpaid. And don't ignore the issue hoping it'll sort itself out 😅

Yes, you can totally file a complaint. First thing is to review your original contract and see what it says about administration changes and fee increases. Generally, the management company has to notify you in advance (it can vary depending on your country/region, but it's usually between 15 to 30 days). If they didn't give you formal notice, that's already a breach. Send an email or certified letter to the management company asking for an explanation of why it went up and requesting that they justify the increase. Keep everything in writing.

In the meantime, you can file a formal complaint with your community's regulatory body (in many places there are consumer advocates or homeowner associations). If other neighbors are also complaining, that's even better, because you can go together. If the management company doesn't respond or refuses to give explanations without good reason, then you'd need specific legal advice from someone who knows the laws in your area, because it varies a lot depending on where you live. But for now, the key step is to document everything and file your complaint in writing 📝

Absolutely, you have the right to complain. I had a similar issue with my homeowners association a couple of years ago - they raised the fees without justification and without giving the advance notice the law requires, so I sent them a registered letter asking them to refund the difference and making it clear I wasn't accepting the unilateral change. The key is to document everything in writing (certified mail, registered letter, whatever) because if you only talk to them verbally, later it's your word against theirs. In most cases the management company or administrator backs down when they see you're serious, but if they don't budge you have the right to resort to mediation or court.

Request in writing (certified mail or burofax) the detailed breakdown of why the rates are going up and proof of the official notice they should have sent you at least 30 days in advance. What a lot of people forget is that if they didn't meet that legal deadline, you have the right not to pay the increase until they do it properly, so don't let them intimidate you into paying right away! Keep everything by email or paper, because that's your shield if it comes to litigation.

In most jurisdictions, any change of administration has to be notified in advance (usually 30 days), and you have the right to demand that official communication in writing, not just a notice on the bulletin board. What a lot of people forget is that if you've already paid the new fees without protesting, it's harder to get the difference back later, so document everything right now: ask the new administrator by email (certified or registered mail) to justify the increase with invoices, quotes, or whatever applies, and keep a copy of everything you exchange. If they don't show you the legal documentation of the administration change or there's no justification for the increase, you've got solid grounds to appeal to the regulatory authority that handles this in your area.

If you've already paid the extra amount, keep all your receipts and proof of payment because that's your evidence that this charge was made without notice, and you're going to need it when you file a complaint with the management company or with the regulatory body that oversees these matters in your autonomous community.