Chandigarh Sector 24C: Legal checks and builder reputations for NRI?

Budget finalised, loan pre-approved — now stuck on which sector. I'm based in Dubai, so a site inspection isn't easy. I've been researching Sector 24C, and honestly, the legal clarity aspect for older properties has become a major concern. Are there specific legal checks or common pitfalls, like ancestral property disputes or issues with power of attorney, that most buyers miss? I'm trying to figure out a robust legal vetting process. Also, about builders like Omaxe or SBP here, what's their actual reputation for timely delivery and construction quality in Sector 24C? Any builders to absolutely avoid? Hoping for some expert advice on these specifics, it'd really help me navigate this from afar.