Help in estimating the cost of industrial remodel in California
Hello, we are looking into the possibility of converting a \~15,000 sq foot building into a warehouse. It is currently used as an open floor plan gym. I'm trying to develop a ball park range on how much it might cost to convert and remodel it. We would be looking to do the following:

* Demolish and haul existing interior floor plan as well as several containers worth of metal equipment (no load bearing walls or structural work expected)
* Pour new concrete floors throughout (currently it is just asphalt)
* Add new lighting throughout
* Upgrade electric and add outlets throughout
* Light refinishing of the interior including fresh coat of paint, patching, etc
* Pour new asphalt in parking lot (\~30 spaces)

This is all in Southern California.

Can anyone give me a sense of how much any of these might cost, ball park and/or whether there are any rules of thumb in terms of estimating for this type of job? We are working on finding a contractor who might give a bid however until now I have not found anyone and we are just in the preliminary stages. Appreciate any insights at all!
[{"id": "guf8rzy", "text": "Can you pour in a concrete floor like that? Is the building not built on a slab-on-grade foundation?", "replies": [], "depth": 1}, {"id": "gufd51j", "text": "This is all just my opinion not any kind of advice.  \n\nDemo metal will be pretty cheap.  You might be able to find someone to take it for free.  \n\nDid they pour asphalt over the concrete foundation for the gym?   This one is strange you should do more research to see what's happening with the foundation.  It needs to be concrete and it's not very easy to re-pour.  \n\nWarehouse lighting isn't that hard.  An electrician can do it for a couple grand and a scissor lift.  Not sure what \"upgrade electric\" means, but just adding outlets isn't that hard.  You can attach conduit to the walls and put in a bunch of outlets for a couple grand.  \n\nDo you just need a new seal coat or a totally re-poured parking lot?  Full depth replacement can run you afowl of various storm water regulations necessitating putting in a retention pond to treat and slowly discharge any stormwater (very expensive).  \n\nJust a random guess from looking into this a few years ago, sealcoat would run around 30k, full asphalt replacement about 60-80.", "replies": [], "depth": 1}]