If the renovator is abiding by all the rules, then there is probably not much more to be done. However, it couldn’t hurt to ask the EC to send a polite request saying that it has had a request to pass on a request that it would be a courtesy that would be appreciated to give some warning to immediate neighbours when noisy work is planned. The letter might include the necessary contact details for those neighbours. That is probably as much as can be asked of the EC. The letter could start out on a pleasant footing by thanking the renovator for observing the rules on times etc.