Design-Build vs. General Contractor: How to Actually Decide
There are two ways to get a custom home built. In design-build, one company designs your home and builds it under a single contract. In the traditional path, you hire an architect to design the house, take the finished drawings out to bid, and hire a builder to construct them.
Most articles comparing the two are written by design-build firms, and most of them reach the same conclusion. This one is written by a design-build firm too. But if you are building on a foothill lot, the thing that decides this question is not the contract structure. It is the ground.
Already have a lot in mind?
Send us the parcel number. Thirty years in Placer County and more than 80 foothill homes means we've usually dug in that area before. We'll tell you what we already know — before you read another word about contract structures.
The two paths, in one minute
Design-build. One contract. The same company designs your home and builds it, and is responsible for both. One number to hold them to, one person to call.
Design-bid-build. The traditional path. It has three words because it happens in three stages. An architect designs the house. The completed drawings go out to two or three builders for pricing. You pick one, sign a construction contract, and building starts.
Both produce good homes. Plenty of beautiful houses in Placer County were built each way. The difference is not the finished product. It is when you find out what things cost, and who is responsible when the design and the budget disagree.
For the longer version of how design-build works here, that lives on our design-build page.
The usual argument for design-build, and where it runs out
The standard case goes like this. One point of contact. Fewer change orders, because the people pricing the work were in the room when it was drawn. Cost visibility during design instead of after it.
All of that is true, and we would say the same about our own work.
Here is the part the other articles leave out. Nearly every design-build comparison you will read cites the same research: projects delivered faster and at lower cost than the traditional path. That research is real, and it is worth reading. It is also not about houses. The most-cited study covered 212 projects across light and heavy industry, offices, high-technology buildings and multi-story dwellings. Sixty-two percent were publicly funded. Single-family homes were not included at all.
Which makes sense. A hospital and a house are not the same problem. But it does mean that for a custom home on raw land, you need a different argument than the one everybody is quoting.
On a foothill lot, the site decides the design
On a finished lot in a subdivision, with a flat pad and utilities at the curb, the house is most of the cost. On a foothill lot, it often is not.
Before anyone frames a wall, the parcel has to answer for itself:
Slope, soils and rock. What the foundation and the grading will actually take. Rock is the expensive surprise.
The driveway. Length, grade, culverts, and whether a bridge is involved.
Water and septic. How deep wells go in that area, whether the soil percs, and where the leach field can physically sit.
Power. How far the nearest service is, and what a run costs.
Fire. Your parcel's severity zone, and what that adds. In a designated zone, Placer County requires construction to meet Wildland-Urban Interface standards, which reach your siding, your windows, your vents and your roof.
An architect can draw a home that is beautiful, correct, and entirely buildable. If nobody prices the site alongside it, you can still end up holding a finished set of plans for a house this particular lot cannot afford. You find out when the bids come back.
One of Mike's clients described it this way: "We were a little nervous about building a custom home on an undeveloped piece of land." That instinct was right. The land is the variable.
What it costs to find out late
The failure mode has a price, and it gets published now and then. A Portland design-build firm has written up a project where the original design came back at $650,000 in bids and had to be redrawn to land near $400,000. The same firm describes a homeowner who spent $15,000 on architectural drawings before anyone established that the project was feasible at all.
Neither is a story about a bad architect. Both are stories about design and pricing happening in the wrong order.
Our approach to this is not complicated. During design, we price roughly a hundred separate cost categories using real bids from the subcontractors who would do the work. By the time you sign a construction contract, about 95% of what your home will cost is known and written down.
Mike puts it more bluntly: "90% of the success of a construction project is determined by the quality of the pre-construction planning."
More on how that works on our plan and budget page.
Don't buy the lot before you know what it costs to build on it.
Our lot guide walks the twelve checks Mike runs before a client makes an offer — slope, soils, water, septic, power, access and fire zone — in the order that keeps you from buying land you can't afford to build on.
When hiring an architect separately is the right call
We are a design-build company, so read this section with that in mind. It is still true.
Hire an architect separately when:
The architecture is the point. You want a particular architect's work, and the house is meant to be that architect's house.
You want to competitively bid the construction, and you have the time to run that process properly.
You already have an architect you trust and a working relationship you would rather keep.
You want to be in the middle of the daily decisions, and you have the hours for it.
Design-build makes more sense when:
The lot is undeveloped and site cost is your largest unknown.
A budget you can hold to matters more to you than a signature design.
You would rather the space between the designer and the builder not be your problem to manage.
One more thing, because homeowners raise it constantly. A design-build number often looks higher than an architect's fee plus a builder's early estimate. Usually that is because the design-build number already includes work the other number has not accounted for yet. Ask both to show you what is in the price and what is not. Compare like for like, or you are not comparing anything.
What to ask before you commit to either path
Five questions. Use them on us as readily as on anyone else.
Who prices the site work, and when? If the answer is "after the design is finished," you are carrying that risk yourself.
How many cost categories are in your estimate? Anything under twenty is a rough guess in a suit.
What happens if the bids come back over budget? Ask specifically who pays for the redesign.
How often will I hear from you, and from whom by name?
Can I speak with someone whose home you finished in the last two years?
Anyone worth hiring will answer all five without flinching.
Send us the parcel number. We'll tell you what we already know.
Thirty years in Placer County and more than 80 homes in these foothills means we've usually dug in that area before. The first conversation costs nothing and ends with a real sense of what your lot will take.
Not that far along yet? Get the lot guide
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