BrainHay:
No, I don’t think anyone goes there with intention to look for a Contractor. When I started my page I was thinking much the same way as HomeSealed touched on.
A lot of the people on my friends list are into Earthmoving, Excavating and Construction as well. So are their friends and friends of friends. As Facebook grows in popularity more and more of our customers will be in there as well (many probably already are). Makes it real easy for them to tell their friends about us. They can also comment on the page and write reviews about our business.
So my hope with it is that some of them will like the Spyder Hoe pics or want to follow the progress of our business and become a fan of the page. When they become a fan of the page then a link shows to it in their profile and exposes me to all their friends.
Also people searching for others with common interests and groups to join will find the page adding even more exposure.
Homesealed:
I think the purpose is more for networking then advertisement. Many times a friend of a friend will notice your line of work and become a customer… At least that is my experience.
Smadax:
We’ve had a Facebook Page for a while, it’s a good way to network amungst your friends and family; but it’s also a great opportunity for paid advertising.
Advantages…
1) Direct marketing; States/Provinces, City, Age, Gender, Educ levels, etc…
2) Pay per click
3) Daily spend limit
4) FREE WEBPAGE
5) Easy to use and update
6) Directly bills to your credit card
7) Can have scheduled start and end dates.
Ads can be paused and/or deleted at any time.
Smadax:
Advertisement directly marketed to my city, approx 70,000 population.
Examples of market information, based on one day…
4,508 times my ad was displayed on facebook.
26 hits on my business page
4 unique visitors
2 linked through paid thumbnail advertisement cost me 60 cents
1 time picture file was viewed
General Statistics…
58% Female viewers 42% Male viewers
5% of viewers are 18-24 yrs old
47% of viewers are 25-34 yrs old
42% of viewers are 35-44 yrs old
5% 45+ yrs old
Pay per click is great because a person has seen your basic thumbnail advertisement (free exposure) and expressed interest by linking to your facebook page I spent 60 cents on this one day and I have my budget set at $2.00/day… with the market being slow, in January I was billed $14.67 and I did get one new client… this advertisment definitely paid for itself! 
You can set your pay-per-click rate to whatever you’d like, minimum 19 cents. The reason you have a choice is because the higher you are willing to pay, the more facebook will expose your advertisement on facebook.
I even use my business page to keep in contract with my crew, when I add a new event, they are sent invitations and if I change anything on that event the crew is sent updates via facebook (email notification)
Devon Z:
Having a Facebook page adds one more place for potential customers to find you or your website. You can post photos of work you have completed, press releases, and articles. Also have current customers become fans and write testimonials about how great your work is on your wall. If you have a link from your website to your Facebook page, then people who are checking out your website have one more place to find out more about you. Plus it is free – just takes the time to set up the page and update with information. Having a Facebook page just strengthens your web presence and gives you another way to communicate.
Techie:
While I think having a Facebook page doesn’t hurt, I don’t see it paying off too much right NOW to be putting in a lot of everyday effort into it. Rather I would set up your facebook page to pull in any blog posts you make or twitter posts. I’d rather spend time on a blog if you have something to say and twitter if you’d like to network with others. I think a personal Facebook profile account as the owner of your business would be more effective if you insist on using facebook. Take an active role in being the spokesperson for your business, even if you’re a 1 man show. There’s definitely a lot of people on facebook but using your personal (make sure you keep it professional) profile would be a better tool on there than a page. Join in on relevant groups and join in on discussions. Search keywords that are relevant to your business and network with those people, and converse with them. I think that’s the way to go about it at the moment.
KCRemodeler:
Seems to be lots of different opinions about Facebook, so I will throw in my two cents for thought.
I would never used the paid advertising part of Facebook for the services we offer!
However, if you don’t have a “page” for your business on Facebook, you are missing out big time.
First of all, it give Google one more page about your company to index. I have some clients that if you search for their business name, their FB page shows up in the results.
Here is how to maximize your use of Facebook….
1. Ask every client to become a fan of your page on Facebook.
2. Post before and after pictures of every project.
3. If the client is a fan of your page, be sure and “tag” them in the picture. When you do this, the pictures show up on their “wall” which then gives you access to all of their network. Their friends will see your page when they look at the pictures. Nothing bettern than an inferred referral!
No more time than it takes to maintain a FB page, I think you are crazy if you don’t have one.
I have a friend that is a photography – kids, families, etc. He generates so much business from FB it is crazy! No reason the same can’t happen in our business.

These are cut/pasted testimonials from other contractors that are having success testing out new marketing ideas and leveraging free web based resources to get more eyes/potential customers on their construction firm. Setting up one of these pages takes about 10 minutes for someone that knows their way around facebook. Feel free to post the links to your pages in the comments to show other contractors some tips and ideas that they could use to better their fanpages, as well as to grow your own fanbases.