How design-build is supposed to work
The standard we build to
Price is downstream of process. The industry publishes a standard for how design-build should be procured, contracted and executed, and most cost surprises trace back to one of the three being skipped.
“Decades of experience across all sectors and project types have given our industry a
time-tested roadmap to success. Design-Build Done Right® Best Practices help
you engineer higher quality outcomes by showing you what works – and what doesn’t.”
Design-Build Institute of America
source
DBIA publishes ten universal best practices and close to fifty
supporting techniques, grouped into three areas: procuring design-build services,
contracting for them, and executing the project
source.
Most of that literature is written for public infrastructure. The principles underneath it are
the same ones that decide whether a kitchen or a whole-house renovation runs well, so here is
what each area looks like on a residential project.
Procuring
Choose the team on qualifications, not the lowest drawing fee
The cheapest set of drawings is the most expensive way to start. You are buying judgement
about what the house will allow — what is load bearing, where the stack runs, what the
county will approve — and that judgement either shows up in the first week or it shows
up as a change order in the twelfth.
Contracting
One contract, one accountable party
Design-build exists so there is nobody to point at. When the drawing and the build sit with
the same firm, a conflict between them is our problem to solve before it reaches you, rather
than a dispute you are asked to referee between an architect and a contractor.
Executing
Agree the sequence before anything is demolished
Which room comes out of service, in what order, and for how long. On an occupied house that
is not a scheduling detail — it is most of what the months actually feel like, and it is
settled on paper first.
Berriz has run design and construction under one roof since 1994, which
is the arrangement these practices describe.