The Game You Didn't Know You Were Playing

What game theory says about building a house, and whose side of the table your contractors sit on.

Every construction project is a game, in the economist's sense: players with different payoffs, each knowing things the others don't, each moving based on what they expect the others to do. Game theory has studied games like this for seventy years, and its lessons are worth knowing before you spend real money on your house.

I've played this game from the contractor's side, leading a framing crew in Portland and later running a steel fabrication shop in Boulder. Most builders I've worked with are honest and skilled. This isn't about bad actors. It's about structure: good people in a badly designed game still make predictable moves.

The Contractor Game

Hiring a general contractor is what economists call a principal-agent problem. You're the principal, and the contractor acts on your behalf. But your payoffs only partly overlap.

The information gap. Your contractor knows what lumber costs this week, which subs are reliable, and what's behind your plaster. You don't, and whoever holds the information holds the leverage.

The hold-up. Once the kitchen is gutted, you can't shop around. A change order priced in month three is priced in a market of one.

The hidden effort. Flashing, fastening, the waterproofing under your shower: all of it is covered within days. When effort can't be seen, the temptation to trim it grows, especially on a fixed-price job where every dollar saved is the contractor's.

Switch to cost-plus and the problem flips: now there's little reason to hold costs down. No contract fully closes the gap.

Changing the Game

When a game keeps producing bad outcomes, game theory says don't swap the players. Change the rules. That's what an owner's representative does. Paid by you, with no stake in the contractor's margin, a rep checks pay applications against work actually done, pressure-tests change orders, and walks the site before the drywall goes up. That changes everyone's moves.

Your threats become credible. An owner who can evaluate a change order can refuse it, and the contractor knows it.

You send a signal. A rep tells every bidder you're a sophisticated buyer, which shifts behavior before a nail is driven.

The long game kicks in. You'll build a few times in your life. A good rep works with the same builders for decades. When players expect to meet again, cooperation beats any one-time win.

At a glance

What grows their payoff. General contractor: margin, the gap between price and cost. Owner's rep: your project going well, and their reputation.

What they know that you don't. General contractor: real costs, sub quality, site conditions. Owner's rep: the same things, which is the point.

Where it can go wrong. General contractor: hidden shortcuts, inflated change orders. Owner's rep: getting too cozy with the builders they see every year.

Who Watches the Watcher?

The long game cuts both ways: a rep's lasting relationships are with builders, not with you. So vet a rep the way you'd want them to vet a contractor. Here are three questions worth asking, and my answers.

How are you paid, and does it go up if my project costs more? My fee is set when you approve your plan. If you choose to add something, we price it together before work starts. If a contractor's costs creep on work we've already scoped, my fee doesn't move.

Do you have financial ties to the builders you recommend? No. Every invoice passes through at cost, with no referral fees or markups.

When have you pushed back on someone you liked? I've fired two general contractors and several subcontractors, some of them people I liked. In my consulting career, I've been responsible for quality where margin pressure never lets up, which has meant pushing back on staff I mentored and partners I respect. Liking someone has never been a reason to leave a problem behind the wall.

The Takeaway

Building is a negotiation between people whose interests partly diverge. The answer isn't to distrust everyone. It's to make sure someone at the table is playing for you. That's the seat Haven takes, from plan to hardened home.