I was hoping there was some way to do this maybe with a higher voltage/wattage transformer (e.g. 16v/30watt), but I'm still not sure if this is enough power. If not, is it at all possible to use multiple transformers to power 4 doorbells connected to a single doorbell button (e.g. maybe with 1 doorbell button connected to 2 transformers where each transformer would be connected to 2 doorbells)?

It seems to me that much larger homes must have similar needs, and I'm wondering how they are addressed. Thanks in advance for all insight and suggestions!

Hopefully, bus driver's suggestions can help solve the problem.

This is in a home at the stud stage (new construction), so I want to add the wiring now to support what's needed later. We haven't picked out any doorbells (or buttons) yet. But what I'm doing is running 18/5 from each doorbell *and* doorbell button location back to my mechanical room. There I'll add any needed transformers and terminate as needed.

I did call both IQ America (Home Depot brand) and Craftmade (found online) as I had seen a couple of nice looking bells (probably chimes in reality). I asked them both if I could install their products (4 chimes) with a single front-door button (I think either brand, as well as probably others, would be okay if nice looking - our decor is more contemporary, so if we found something that looked good, we'd go with it). However, both companies said no-go. They said that I could do up to 3 chimes. But that leaves either my garage or shop without a chime/bell.

I know that doesn't answer the question thoroughly, but I'm not sure what to provide at this point, but want to make sure I run the appropriate wiring if something different is needed to support my goals (4 bells *or* 4 chimes - all the same if needed).

Hey, really hope your medical issue turns out okay - thanks for taking the time to respond!

I don't know how much money you want to spend, but I purchased for about $300, a system where you have one doorbell, and 2 TV monitors. CAT5 cable was run to each area. Each tv monitor needs a transformer. We put a 'hidden' spot in the garage where all the transformers plug into a double duplex using a plug in strip to give them more room since transformers are wider than a plug size. We basically got some 18g 2-wire and ran that from each tv monitor location to where the 2gang duplex would be in the garage. Then after drywall went up, the transformers were cut and spliced into the 2-wire that went to the tv monitors. Each monitor needs a separate transformer according to the Lone Star people. since you would use 4 locations, they might have something where you just use a couple tv monitors (expensive) and a cpl locations that can just do 2-way audio.

This system is also available in a 4 monitor. It was a Genway brand which is sold by a company in Houston, TX. They have real live phone support and were nice. They also have a store on Ebay, but if you buy direct from them like I did, they gave me a discount since they didn't lose money through their ebay fees. They are called Lonestar Group. but there are other companies (google video door intercom).
See link.

I liked the look and feel of the DNS7 doorbell/camera. If feels heavy in your hand and I have gotten a lot of compliments on it and I live in San Francisco where people are very style conscious. Both the plumbing inspector and the Glass Installer asked me where I got my doorbell.

However the angle of the camera is not very wide so if people are not standing right in front of it I can't see them. There is 2-way audio so you can ask them to step back.

My system was $300, but they are able to give you a package with more monitors. Just call them on the phone to ask. Their tech support can even explain about how to cut the transformer wire and splice it so you can run it longer through the walls. But it's really simple. We did not do any splicing in the wall. We did it outside in the garage where it is accessible.

You still need to run the 18g for the power from each tv monitor to the location in say the garage where you have a duplex with a surge protector strip for the transformers to plug into. I like the system I have - my only complaint is the small angle of the camera - but it is better than no camera and the audio is very nice. Sometimes I use it to tell the UPS guy to leave the package at the door since I don't want to run downstairs right away.

Also, since you are in the rough now - might I suggest running some CCTV wire for a future camera system?
I bought a cheap starter system from tigerdirect - it came complete with 4 cameras and a recorder and you can put it on your internet to spy on your house when you are not home (nightowl was one I got but they have others).
I did not use the free wire that came with it. I wanted good wire in the walls before we closed since the cameras I can always upgrade later. I went to my local electrical supply shop and bought a full roll of RG59/pwr line called siamese since it has 2 wires bundled together. It basically has an RG59 cable bundled with the power line and is officially used for CCTV everywhere. The higher quality wire will give you better reception and less noise. I also had to buy connectors for ends of the RG59 and the power line in cameras. I did connections after all the walls were up and got the connectors on amazon for cheaper than my local shop. I regret not running the RG59/pwr cable to more locations so that I could later expand to an 8 camera system. Here is a link to the Siamese cable: http://www.cablestogo.com/product.asp?cat_id=317&sku=43113
they probably have connectors to cameras too.

the main guy I talked to there didn't know as much - but I asked to talk to the tech support guy and that was helpful.

If you are in the Houston area - they do the install too, but I did it myself with a helper - using their directions and phone support.

I am a little confused now though - from the sound of it did you already buy an Intercom system? Can it be returned if it doesn't support ringing in 4 locations like you want?