Office building rehab: any advice for final walkthrough once rehab is “complete”?
I have a final walkthrough for a gut rehab office building, where I’ll go through with the GC and come up with a punch list of remaining items. My assumption is that once this punch list is complete, they are “done.” I’m concerned that I’ll miss some things that I wished I knew to look for or ask for. I’m not a contractor or an inspector. 

Any advice or tips for making the walkthrough productive and thorough?

Edit: architect, designer, engineer all work for the GC, if that affects advice.
[{"id": "i6u9vsg", "text": "Your architect and engineer should do punch list. Also get someone to commission meps.", "replies": [{"id": "i6ubgd6", "text": "Absolutely this. You can join in, but you shouldn\u2019t be doing the actual inspection.", "replies": [{"id": "i6up679", "text": "Should I hire an inspector maybe?", "replies": [], "depth": 3}], "depth": 2}, {"id": "i6up2au", "text": "They all work for the GC. Would that mean they would all be biased in some way?", "replies": [{"id": "i6v0fao", "text": "The GCs architect and engineer should actually still provide a punch list and be responsible for reviewing scope completion. Issue is their relationship to the GC will prevent you from getting a fully unbiased review. Especially if something big is uncovered. \n\nYou should look into to hiring a third party to review the HVAC/Electrical/Plumbing. Most engineers provide commissioning services. It\u2019s crazy what sort of shit gets uncovered during commissioning.\n\nYou might be able to get away with just relying on the GCs architect for architectural punch list, depending on how much you trust yourself to sus out quality issues on the archi-trades.", "replies": [{"id": "i6v82l2", "text": "GC should provide a punch. Their should be a third party commissioning agency for MEPF systems. Do you not have an owners rep or construction manager since you aren\u2019t a construction guy?", "replies": [{"id": "i6wv7d4", "text": "I don\u2019t. :/", "replies": [], "depth": 5}], "depth": 4}], "depth": 3}], "depth": 2}, {"id": "i6up4lq", "text": "MEPS?", "replies": [{"id": "i6v87s4", "text": "Mechanical electrical and plumbing systems.", "replies": [{"id": "i6x7kzq", "text": "And fire protection, it's MEPF.", "replies": [], "depth": 4}], "depth": 3}], "depth": 2}], "depth": 1}, {"id": "i6uueug", "text": "Hire someone outside of the GCs Team to reviews everything. A local architect or owners rep firm would be good", "replies": [{"id": "i6v0kxk", "text": "Agreed with owners rep. If you have to ask this type of question, you\u2019re probably better off using one. Though might be difficult to get one just to do punch list.", "replies": [], "depth": 2}, {"id": "i6v85l2", "text": "Yea, any projects going forward you need an owners rep or construction manager.", "replies": [{"id": "i6wvbva", "text": "Thanks. I\u2019m surprised my broker and lender never suggested this.", "replies": [], "depth": 3}], "depth": 2}], "depth": 1}, {"id": "i6vgk4b", "text": "Have an owners rep accompany the arch and GC for the punch list.", "replies": [], "depth": 1}, {"id": "i6widhp", "text": "I\u2019m a little unclear. You\u2019re the owner? Is there a tenant?", "replies": [{"id": "i6wve0w", "text": "I\u2019m the owner. No tenant yet. I\u2019ll be one of the tenants and then there will be a few others.", "replies": [], "depth": 2}], "depth": 1}, {"id": "i6wugrk", "text": "My best advice is to sell the office building and get into something less risky in the current environment", "replies": [{"id": "i6wvg6i", "text": "Once it\u2019s rented I might consider that.", "replies": [], "depth": 2}], "depth": 1}, {"id": "i6x5vpl", "text": "Easy. Walk through on your own before you walk through with the GC. You should prep the punch list privately before you do the walk through with the GC. Make sure you identify everything. If you need to bring experts with you to do that, then bring those experts beforehand. They can advise you and you can prepare the punch list on your own.\n\nThe walk through with the GC is to get the GC to buy in on items you've already identified, NOT to identify those items with the GC at your side \"on the fly\". Doing that is a noob move.", "replies": [], "depth": 1}, {"id": "i6xfoza", "text": "Electrical outlets - how many, where, how much power do you need?", "replies": [], "depth": 1}, {"id": "i75j0fo", "text": "You need the 3rd party (you hire them directly) advice on whether the construction contract is completed and done right. This needs to be probably a team and they need to understand the design and construction of everything in the construction scope. \n\nDefinitely include MEP commissioning in that. Depending on the project size, there may have been 3rd party investigation already. \n\nThe design people are likely to have some contractual obligation to you, the Owner, already. I'm an architect and my contracts are written as assisting the Owner. I change these a little for this particular liability when working for the contractor in design-build situations.\n\nThis is one of the tradeoffs when changing from design-bid-build project delivery to design-build project delivery. The single point of contact aligns design and construction teams.", "replies": [], "depth": 1}]