... When I write my script should I imply in the scene headings, that every scene could be part of the same location? For example, every scene that too place in the police station, whether it be the interrogation room, or the inspector's office, or the briefing room, should I write police station in each scene heading before writing the specific room then? Would that come off as me being too obvious since the reader knows we are still in the police station though?
You, the screenwriter, write the
descriptive location where the scene takes place. If you want to write "INT. POLICE STATION, INTERROGATION ROOM", "INT. POLICE STATION, INSPECTOR'S OFFICE", "INT. POLICE STATION, BRIEFING ROOM" that's fine. It's important if there are two or more different "briefing rooms" used in your film (police station, bank, city hall, etc.). If there's only one and no chance of confusion, then you can leave off "Police Station" in each header.
I will layer my headers to make it easier later for continuity and production. I'm not playing producer but know what makes it easier for me as AD down the road using features built in to CeltX and many professional screenwriting software that assist in production planning. The audience isn't going to know what's in your script, and a reader won't care as long as you're consistent and use good formatting. The producer may secure one physical building or use three different locations. Not your concern at this point.
You're not telling a producer or director where they are to shoot.
Also, if the shoots must take 12 hours, how do I get the location owners to be okay with that? The current movie I am helping out on right now, the director and producer are having trouble securing locations for that long at a time, with the owner's schedules. The feature I helped out on last year, the director planned every shoot to to take no longer than 2-4 hours, because the owners were not okay with the locations being used longer. So is it a matter of more money? Do the shoots have to be 12 hours at a time? Cause this could be a problem based on other experiences, unless we are doing something wrong.
To the point, H44, mind your own damn business as the screenwriter and
let the director and producer do their own jobs. Scouting/planning
physical locations and shoots ARE NOT your responsibility. Just write the damn script. You have to have the script done before you can do the breakdown. Write your script FIRST, then the director and producer you're working with can give you better advice. You don't worry what color you're going to paint the walls and which rooms to carpet before you draft the blueprint. You need that to know how many and how big they are to determine the gallons and square feet.
Making a film is like building a house. You can design mansions, castles, etc. but you won't find many buyers. Most people buying castles will hire someone with experience designing castles. You can design houses of many sizes to fit price ranges. Some houses are better suited for certain locations. All modern homes have certain basic features--living space, private space, public space, utility space and storage space. A good screenwriter, like a clever architect, can repurpose space/locations. ONCE the design is drafted, it's reviewed and sometimes passed along to other production experts.
These experts will make sure the plumbing and wiring are adequate and make calculations of loads and construction expenses. These are your producers. They'll work to secure funding and get together the crew and construction manager ("director"). Later they'll contract interior designers and landscapers ("visual, audio and FX artists") to work with the construction manager to create ambiance and curb appeal.
Unless the architect is also the construction manager (as "writer/director") or is on the payroll of the construction company ("studio"), your role often ends once the blueprint is purchased. Often they will engage sales agents ("casting directors") to sell and line up prospective clients ("actors"). Sometimes the clients will request changes. Sometimes due to economic situations, the construction manager makes changes. If there's a HOA ("investment group") they may dictate changes also.
You keep asking questions like "Should I wall paper or paint the bathroom since it takes time to dry and people need to use it?" when all you've drawn so far is a box and labelled it "bathroom" with no window, door or fixtures. Your responsibility when drafting up the blueprint is to decide where the bathroom goes, its shape, put in some basic fixtures and move on. Let the rest of the workers do their jobs decorating and recognize that it's exceedingly rare for changes not to be made down the road.
Stop playing director. Stop playing producer. Start being a writer and write. There will be plenty of time to be the other two later AFTER you have a finished script. You need to be a storyteller first.