Your best bet is to find your own agent.

I played around with some of the ways of looking at value in the Introduction to Real Estate Analysis article by J Scott, but whenever I think of an offer I get worried I am either insulting him or giving away all my hard work (3 years of time assembling lots and getting it through city approvals, and serving as an uncompensated GC for net zero energy certification and most of the site work).

His name is Jode Allen and I can put you in touch if you PM me here on the site. 

LOL if they did it'd probably crash the site

A “company” that wastes their marketing dollars mailing to houses where title transferred in the last three months and that appear to be active construction sites isn’t one I could see myself sitting down with.

Smaller community banks and credit unions are your best bet.

@Egan LohmanBest bet for data analysis like this is to use the Google Maps API.

What should I be looking for when I'm browsing sites such as Realtor.com?

Have them syndicate to their affiliate sites. 

Plenty of good contractors aren't going to HD to get their stuff, they'll get it delivered to the job site.