| Featured Project
|View the case study here.
McDowell Design Build
Project: Built Green 5-Star Home.
|Star Level: 5-Star
|Checklist: Single Family
|Verifier: Tom Balderston, Conservation Services Group
|Site and Water
|Indoor Air Quality
|House Size Multiplier
|Project Total Score
Built by McDowell Design Build, this single-family home in Ballard nearly surpassed 600 points on its way to achieving Built Green 5-Star. The 2,600-square-foot five-bedroom project scored high point totals in every environmental category. Starting with site development, this infill project preserved existing birch trees on the site, installed a rain garden and ground waste wood for reuse on the site. The roof drains into a 400-gallon cistern that can be used to water landscaping during dry summer months. Along with the rain garden, the home has a pervious concrete driveway to facilitate rainwater infiltration into the soils. Finally, soils were amended to 10-12 inches and drought tolerant landscaping was installed. On the water conservation side, dual flush toilets were installed throughout the home, along with 1.3-gallon-per-minute faucets and 1.5-gallon-per-minute showers.
The home is expected to use 35 percent less energy than required by the 2009 Washington Energy Code. This energy efficiency starts with advanced framing, blown in fiberglass Blown in Blanket Insulation and 1 inch of rigid foam on the walls, R-49 blown in wool insulation in the attic and continuous R-10 rigid insulation beneath the slab. Next, the home was sealed and checked, achieving an air-tightness rating of 2.2 ACH50. The home maximizes the south and southeast facing windows combined with tuned overhangs to allow for solar heat gain. A south-facing roof plane combined with pre-conduit for solar allow for the easy future installation of solar panels. On the heating side, a high efficiency natural-gas system was installed, along with an on-demand Rinnai tankless water heating system. Eighty-eight percent of the lighting in the home is compact fluorescent, and an energy star front-loading washing machine, refrigerator, dishwasher and cooktop were used.
Low toxic products were used throughout the home, including adhesives, paints and formaldehyde-free MDF trim. The cabinets are also no-added formaldehyde, and wire shelving was used as an alternative to fiberboard. The plumbing used ABS and PEX, avoiding the use of PVC piping. To reduce the likelihood of mold developing in wall cavities, 24" overhangs, sloped sill pans with end dams and metal flashing were installed and tested. Finally, a whole-home radiant system, as opposed to ducted heating system, reduces the amount and distribution of dust in the home.
To reduce waste, and extensive source-separated recycling plan was developed, and a 92%-percent overall recycling rate was achieved. Decking, rails, joists, fir flooring, fir beams and plywood were all salvaged from the previous home on the site and re-used in the home. To reduce the amount of cement in the concrete, a 26-percent fly ash mix was used in the foundation. The home features green finish materials as well. FSC-certified bamboo flooring, recycled content porcelain tile and finger jointed trim were all used in the home, and the cabinets were made form locally sourced maple from Pierce County.
While much of the infill development in Seattle is most commonly of the townhome and apartment variety, this home is a great reminder that there's still a place for new single-family dwellings in the city, especially when they're 5-Star Built Green.
Photos courtesy of Paul Clark of Walkthrough Media.
To see other previously featured virtual tours, click here.
Classes listed below are approved workshops for fulfilling the annual Built Green education requirement for certifying projects.
Introduction to Built Green®
June 11, MBA Housing Center, Bellevue
This class will provide an introduction to the Built Green program. Learn how to certify a project, use the checklist, join, navigate the program and take advantage of our other resources. It also presents examples of Built Green projects and covers how to fill out the Built Green checklist. This orientation costs $30 and is required in order to certify homes as Built Green. Register here.
Green Genius: Green Specialist: Module 3
June 28, Seattle
This Green Real Estate Specialist in-depth green training covers site and design; energy; water; materials; indoor environmental quality; maintenance and operations; green and energy efficient mortgages; the greening of the Multiple Listing Service; green appraisal standards; marketing and branding green; and tips on greening your business. Also included will be exceptional information for real estate agents defining green and its implications for home sales. Students who attend all three sessions will earn the national Green Real Estate Specialist (GRES) designation.
| New Certifications
YS Development for certifying their three new single-family homes at 4019, 4029 and 4039 131st Place SE in Bellevue as 5-Star Built Green.
SBC Construction for certifying the single-family home at 10328 298th Ave. SE in Monroe as 5-Star Built Green.
JacMarc Homes for certifying the two single-family homes at 17285 and 17295 NE 36th St. in Redmond as 3-Star Built Green.
Polygon Northwest for certifying the 13 new single-family homes at the Forest Ridge community in Issaquah as 3-Star Built Green.
Dwell Development for certifying the three single-family homes at 3157, 3155 S. Oregon St. and 3339 37th Ave. S. in Seattle as 5-Star Built Green.
Pluma Homes for certifying the four single-family townhomes at 3438 23rd Ave. W. in Seattle as 4-Star Built Green.
McDowell Design Build for certifying the single-family home at 711NW 73rd St. in Seattle as 5-Star Built Green.
Housing Hope for certifying the nine single-family homes in the Marvin Gardens community in Monroe as 4-Star Built Green.
DC Granger for certifying the single-family home at 7511 14th Ave. NE in Seattle as 4-Star Built Green.
MM Properties for certifying their multifamily apartments at 11801 97th Lane NE the Juanita Village of Kirkland as 3-Star Built Green.
Urban Vision for certifying the three single-family homes at 1721, 1723, and 1725 S. State St. in Seattle as 4-Star Built Green.
Sage Homes Northwest for certifying the single-family home at 4465 Brygger Drive W. in Seattle as 3-Star Built Green.
gProjects LLC for certifying the 11 single-family townhomes at the Urban Trees community in Seattle as 3-Star Built Green.
Build Sound for certifying the two single-family townhomes at 910 6th Ave. N. in Seattle as 4-Star Built Green.
Sage Homes Northwest for certifying the three single-family townhomes at 1753 NW 63rd St. in Seattle as 4-Star Built Green.
Blindheim Company for certifying the five single-family townhomes at 5712, 5714, 5716, 5718 and 5720 28th Ave. NW in Seattle as 4-Star Built Green.
| New Members
Are you a member of Built Green and the Master Builders Association? If so, your company is designated with a small, green tree on the Master Builders Association's website, which signifies you as a Built Green member. Your company is also listed on the Built Green website.
Welcome to our newest member companies!
Epic Construction Management, Inc.
Lennar Northwest, Inc.
Urban Vision LLC