The two ways a remodel gets bought
Almost every remodel is bought one of two ways, and the trade names for them are older than the marketing that has grown up around them.
In bid-build (the longer name is design-bid-build) you hire a designer or an architect first. They produce drawings, you hand the same drawings to several general contractors, they price them, and you sign a construction contract with one of them. Three parties, two contracts, and a competitive moment in the middle where the market tells you what your drawing costs.
In design-build, one contract holds both halves. The company that will build the job also draws it, or carries the designer inside its own agreement, and the price develops alongside the drawings instead of arriving after them. That is the entire structural difference. Speed, cost and control are all downstream of it, and most of the arguing about those three is done by people who sell one of the two arrangements.
What bid-build actually does
Bid-build gives you something nothing else does: several builders pricing one fixed document at the same time. If the set is complete the numbers are comparable, and the spread between them is real information about the market, about how each builder reads the job, and occasionally about which one has not read it at all.
The cost is sequence. You commission and pay for design before anybody has told you what that design costs to build. If the bids come back above budget you are no longer choosing between builders, you are paying to redraw, and the value engineering that follows happens under time pressure on a document optimised for a different number. It also assumes the drawings are finished, and residential remodel sets very often are not. A set that fixes a kitchen layout but says nothing about how the new beam lands or where the panel goes is not a biddable document. It is an invitation for six builders to guess differently and for the cheapest guess to win.
What design-build actually does
Design-build removes the hand-off. The people who will be responsible for buildability are in the room while the layout is still moving, so the expensive ideas get caught while they are still lines on paper. Moving a wall that happens to carry the roof is a twenty-minute conversation in week two and a change order, a priced, signed addition to the contract, in month four. It also compresses the calendar, because permitting, long-lead ordering and trade scheduling can start against a set the same company is finishing.
What you give up is the competitive bid moment. No week exists in which three independent builders price the identical document, so discipline on the number has to come from somewhere else: a separately priced design phase, a line-item scope you can read trade by trade, published allowances, a stated markup on change orders, and your own ability to take the finished drawings elsewhere. Without those, design-build is a single-source purchase with a nicer name.
The question underneath both: who owns the drawing error
Concealed conditions happen in either arrangement. Nobody knows what is behind a 1970s wall until it is open, and no contract structure changes that. The difference is what happens when the drawing is wrong rather than the wall.
Under bid-build the drawings are your document. The builder priced what was drawn, so if the drawn beam does not carry the load, or two trades were drawn through the same six inches of ceiling, the fix is a change order and the cost is yours. Your remedy, if you have one, runs back toward the designer you hired. Under design-build the same error sits inside one company’s scope, which is why the incentive to catch it early is structural rather than moral. You are not choosing between two vibes. You are choosing where the drawing risk lands.
When you learn the price, and how firm it is
Both arrangements give you a number. They give it to you at different moments, with different amounts of design behind it, and confusing the two is how people end up comparing an estimate to a contract.
| Moment | Bid-build | Design-build |
|---|---|---|
| First number | After design is complete and bids are returned | Early, as a range, against a scope narrative |
| What it is based on | A finished set every bidder read | Square footage, scope, finish level, structural intent |
| When it becomes a contract price | At award, before construction starts | At a named gate, once drawings and selections are fixed |
| What moves it afterwards | Change orders, concealed conditions, allowance overruns | Change orders, concealed conditions, allowance overruns |
The last row is identical on purpose. No delivery method protects you from a change order; only a written change-order clause does, and it is worth reading in both. If the early range is what you are after right now, the cost calculator will give you a planning range before anybody draws, from room type, size, finish tier and whether structure moves.
Which one suits somebody doing this once
Bid-build rewards a client who already knows what they want, has a designer they trust, has the time to run a bid period properly, and is comfortable holding the drawings. It is the right answer more often than its reputation suggests, particularly when the scope is unusual enough that you want an independent designer with no stake in who builds it.
Design-build rewards a client buying construction for the first or second time, whose scope is still moving, who wants one phone number when a trade does not show up, and who would rather learn in week two that the layout is over budget than in month four. It is also the honest answer when the project is small enough that a full bid period costs more in fees and calendar than it recovers in price. A whole-home renovation, an addition and a garage conversion can each be bought either way in this market. Whichever way you lean, it is the first real fork in the order a Reno remodel gets planned in, because how you hire shapes every decision that comes after it.
What to ask for, whichever one you pick
These questions separate a well-run arrangement from a badly-run one, and they work on either side of the argument.
- Is the design phase priced separately, and what do I own at the end of it? You should be able to leave with the drawings.
- Is the construction price a line-item scope or a single number? A single number cannot be compared to anything, including itself six weeks later.
- What is excluded? The exclusions list is the most informative page in any proposal and the one most often left out.
- What triggers a change order, how is it priced, and who signs it? Labour plus material plus a stated markup, in writing, before the work happens.
- Who holds the subcontracts, pulls the permits and schedules the inspections? If the answer is you, then you are the general contractor, whatever the paperwork calls you.
We run design-build, so this page is written by an interested party and you should read it that way. What we can do is name the weakness: there is no competitive bid moment, and the only thing that replaces one is a design phase you can walk away from with the drawings in hand. That is how ours is written. If your project is well defined and you want three independent numbers on one set, that is a reasonable thing to want, and we will say so on the phone rather than talk you out of it.