Q. What’s your top piece of advice for clients and the entire project team regarding cost efficient design?

A. The most important thing when you’re taking a hard look at cost-efficient design is building a strong, committed team. The owner can really help drive the ship by building a team that will support the goals that they’re advocating for. So, when they bring on a design team or a general contractor, it should be with a clear instruction that this project is prioritizing cost containment and you’ve been selected to help lead us in that direction.

Q. What impact does site selection have on project costs?

A. It can be huge. Some sites are quite simple. They’re flat, they’re unencumbered, they don’t have any nasty soil conditions, they don’t have any onerous zoning requirements. They don’t have a complicated design overlay. And then there are sites that are just the opposite. Maybe they have a lot of topography and require a subgrade system to get a buildable foundation for the building.

They might have really contaminated soil that requires a lot of upfront costs. If it’s in a historic district, there’s historic design overlays. Other design overlay districts require extra jurisdictional review. Anything that takes extra time, extra effort, extra coordination just creates extra work and stretches out the design schedule, which is going to cost the project more money at no significant benefit to the end-user or the developer.

Q. Is it possible to have elevated design while also reducing costs?

A. I know it sounds like it could be an oxymoron, but YES! We know we need to approach the project from a cost containment standpoint, and we want to have design at the forefront of every decision we make. It’s not cost containment first, design second; they should be parallel goals. We can still do excellent design and use those constraints around cost containment as a driving force for our creativity. How we can be creative within the constraints of cost containment – and letting that be our design challenge.

Q. What have you learned about designing efficient units in a way that prioritizes cost containment?

A. One of the biggest things is to design the units with as few variations as possible. We would minimize the number of unit types and then design each of those unit types as efficiently as possible. We also start by asking the question, How small can we make the unit and still make it livable and dignified and usable? The simple truth is square-footage costs money.

On Wy’East Plaza, we built a full-size one-bedroom mockup and loaded it with furniture and people and cabinets and asked, Is this too small? Okay, let’s move the wall out by 12” or 24”. How about now?

Once we felt like we’d found the lowest comfortable size by reducing the square footage we worked to put the whole building on a 24-inch module. This works really well with the scale of building materials. Then we worked to minimize inside and outside corners within the unit, each little moved saved. We tried to minimize the number of doors to reduce purchase and install time. so that there’s a door into the bedroom, a door to the bathroom and that’s it.

Q. How do materials and components factor in to cost cutting?

A. It’s important to work around standard material sizing from the industry so there’s not a lot of material waste and not a lot of cutting and fitting for the folks forming the concrete, the framing contractor, the drywall contractor, etc.

If everything’s designed around those material modules there’s less waste so they’re not having to buy as much overage. Then, you can take it more to the procurement level like, Are we buying materials that are locally sourced? Is the brick coming from Oregon versus Ohio? We look for those kinds of efficiencies wherever we can get them.

Q. Can you talk about leveraging the expertise of subcontractors. And how can their knowledge and experience help ensure design efficiency?

A. This is hugely impactful. How to do that is a trick that falls on a quality established general contractor, who has a lot of existing relationships with quality subcontractors. Those relationships can be leveraged to get subs to participate in the early design work not yet knowing whether they’ve won the bid.

Once you get the subcontractors engaged in the design process, then you start asking them, What would a building look like that has the most efficient plumbing system? What would a building look like that has the most efficient HVAC distribution system? If you could put your electrical room anywhere in the building to be the most efficient to install, and purchase equipment for, where would that be? If we do the roof this way is it more complicated than if we do it this way? What if you were king or queen for the day? And then you just listen. Really, nobody knows more about how buildings go together than the people who are on the job site doing the work, so it’s great if you can harness all that practical experience.

Q. What have you learned about setting a project up for successful approval during the design review process?

A. Well, one way to look at it is that we have to be humble designers. What I mean by that is if we design something and hope to get approval for it because it doesn’t exactly match the zoning or the design overlay requirements, and we’re going to have to ask for special compensation for a design move that we think is important but doesn’t match what’s allowed, then we’ve put another encumbrance on the project that’s going to cost time and money to resolve. So, we try to leverage our creative design abilities to do the best building we can within the existing set of approved design criteria. If we’re in a zone that has a particular set of design overlays, then we need to just work within those constraints and not try to use this project to flex our most impressive design edginess.

 
Click to read and download the Seven Principles of Cost Efficient Design, assembled in partnership with Walsh Construction and Reach Community Development.

Michael Bonn, Principal

Over the last several years, more demand in smaller markets has resulted in increased proposals for larger scale developments. These jurisdictions have not previously had to review projects that utilize code criteria that are unique to larger building types. 

From the construction permitting point of view, bigger buildings have different codes, and those codes have different interpretations from city to city, and sometimes reviewer to reviewer. 

Jurisdictions are experts at the familiar but can often be resistant to the new. Given the role that building officials play in safeguarding the health, safety, and welfare of their community, a conservative approach to new code criteria is a reasonably common practice.  

Our experience in jurisdictions with more complex code usage can help clients understand the way others have successfully worked with designers to implement unfamiliar strategies in code compliance. 

Our expertise in larger buildings in bigger markets can be valuable with code analysis and interpretation in smaller markets, both from the designer and reviewers’ points of view.  

We have consistently seen that building official/fire marshal engagement prior to submittal is key. Meeting early and often minimizes unforeseen issues arising during plan check review. Our history of discussions/solutions from multiple jurisdictions allows for specific issues to be flagged and addressed with real-world applications that have been proven to be successful. 

We have found that when discussing podium construction there are several key elements to consider within the wood-framed components that differ from applications that do not include a concrete podium. Here are a few key items to consider:  

• Type III: A wood construction with two-hour rated exterior walls, from the inside and out.
  When building height exceeds 70 ft., this construction type allows for building heights up to 85 ft., and requires non-combustible exterior wall construction, commonly achieved through the use of fire-retardant treated lumber. Cladding and its support elements must also be non-combustible above 40 ft. Critical considerations include close study of the highest occupiable floor level based on fire access set-up point. If the lowest point of fire access results in a dimension to the highest occupiable floor level that exceeds 75 ft., then high-rise criteria become applicable. Cost typically limits high-rise construction to projects which far exceed 75 ft. height. Designers must consider this cost impact, especially when contemplating occupied roof decks, which some jurisdictions will allow to exceed the 75 ft. height, while others will not. 

Project Example – Hudson on Farmer (Farmer Arts), Tempe, AZ (Framing construction, completed building) 

• Type V: A wood construction with one-hour rated exterior walls from the outside.
  When construction does not exceed 70 ft. this construction type allows for reduced costs and more easily managed fire resistivity criteria. Building area is limited, and in many cases fire walls within the building are required to compartmentalize the structure. For multifamily buildings, corridors penetrate these walls requiring rated opening protection. Although these walls add cost, they provide an opportunity to reduce the number of stairwells when used as horizontal exits between building compartments. Designers must consider how, and when, to use the horizontal exit tool, ensuring that no more than half of the required exits from a floor level are provided by horizontal exits. Additionally, these opening assemblies can be provided via several options, including manufactured assemblies, and custom specified components. Designers must consider the comparative costs of the different approaches and the capacity of the project’s general contractor to manage the installation of the selected approach. 

Project Example – Modera Northgate, Seattle, WA. (Final rendering, floor plan compartment diagram)  

• Type I: Podium/basement non-combustible construction of one, two, or three levels can be provided as a podium for multiple stories of wood construction above.
  The ability to allow for the wood frame construction type of the building above to penetrate the podium reduces costs when stairs are able to be built of wood. Exterior wall framing must be built of non-combustible framing, however, when using metal studs, exterior insulation is often required to meet energy code insulation values. Using fire-retardant treated lumber can be an effective tool in allowing for exterior sheathing and cladding planes to align across the podium level. 

Project Example – Canopy (Shea Aurora) Phase II, Shoreline, WA (podium construction photo, final rendering) 

There is no one-size-fits-all solution. However, being able to work from multiple points of view allows for specific concerns to be addressed, while looking to past successes for location-specific solutions. 

by Don Sowieja, Principal AIA, NCARB