2,000 - 3,000 square feet | TC Legend Homes

Tree-View House

by Senna | Jul 12, 2022

Sitting nestled in the trees with beautiful green views out of every window, this house really lives up to its name—Tree-View House. Both clients and designer Jake did a superb job ensuring the color of the forest framed the main living spaces through the thoughtfully placed windows and use of neutral-colored finishes, making you really feel at one with the surrounding ecosystem.

As a family of 5 with a need for both play and work, Tree-View was designed separating the children’s space from the parent’s space with 3 bedrooms and a wet bar on the lower floor and a master suite plus office on the main living floor. The lower floor suite and wet bar were also designed with dual purpose, as they can be turned into a mother-in-law suite in the future. The front entrance also features a large wooden deck at street level, allowing the main floor to be aging-in-place accessible. Additionally, the deck is a great way for the family to engage with the community and can double as a play area along with the spacious driveway. In total, the house is 2,116 square feet with 4 bedrooms and 3.5 bathrooms.

Tree-View is built using our tried-and-true envelope and mechanical systems: 6.5” structural insulated panels (SIPs) walls, 10.25” SIPs roof, 4” R20 foam under the slab, R24 insulated concrete forms (ICF’s), Chilltrix CX34 heatpump with (1) fancoil unit, Fantech HERO 250H HRV with comfopost heat/ cool delivery, Vinyltek triple pane windows and Thermatru front door.

Obtaining a 0.56 air changes per hour envelop seal, this house exceeds the Passivehaus standard. Tree-View is also expected to receive a 5 Star Built Green rating, along with Department of Energy’s Zero Energy Ready Home rating, Energy Star certification and EPA’s Indoor AirPLUS certification.

As always, indoor air quality (IAQ) is of utmost importance for TC Legend and our clients and Tree-View is no exception. With a top-quality heat recovery ventilator (HRV), humidity & CO2 sensors, HEPA filters, Awair IAQ monitor, and GreenGuard Gold cork flooring this house was built for clean air. Unfortunately, after about 2 months post-move-in, the surrounding cottonwood trees took an unexpected toll on the house. The massive amount of cottonwood fluff clogged the HRV intake and started cutting off the houses supply of fresh air. Thankfully, the Awair IAQ monitor immediately alerted the clients of the decreasing IAQ, allowing them to reach out to our team who swiftly acted and resolved the issue. Now all parties know to clean the intake regularly during peak cottonwood season!

The clients also opted for upgraded Kasa Smart light switches which connect to their phones and can be voice commanded by use of the central smart home device. According to their feedback, this has been a huge success and is incredibly helpful. Thus, further proving this smart home is truly the way of the future!

Neos House

by Senna | Aug 26, 2021

The Neos house is a 4 bedroom family house. 2614 square feet. Completed in spring 2021.

Designed as a multi-generational home with one full bathroom & one full bedroom on the 1^st floor, if the piano-room & the rec-room were enclosed with walls we’d have a 7-bedroom home. Enough for a substantial family to live together.

Pointing south, the view looks towards the huge garden.

The garden spills into the dining area through sliding doors. The folks who commissioned this home are gardeners, with kids, who will be drawn towards the natural world as a way to thrive.

The weather briefly nips at you as you walk from the front door to the garage under the covered walkway, creating a connection with the day’s weather and the world outside the energy-shell.

The SIPs installation was subcontracted because this is a Bellevue job & the TC crew have northern families & want to be home at night if possible. Issac taught a Peruvian framing crew how to sling the SIPs and the job ran fast & smoothly using advanced SIPs details required by the Bellevue jurisdiction.

Despite one design mistake (the mechanicals are in the unheated garage), this house is an exercise in textbook design for cost & energy performance.

The client did a stellar job of following design advice & the crew lovingly built the house, sealing the envelope to 0.6 air changes per hour, Passivehaus standard. The result is an economical house that has won a Department of Energy Grand Prize, attained 5-star Build Green certification and is certified Net Zero.

The envelope & mechanical systems are all drawn from the 2020 TC system: 6.5” walls, 10.25” SIP roof, 4” R20 foam under the slab, R24 ICF’s, Chilltrix CX34 heatpump with (1) fancoil upstairs, Zehnder 350 HRV with comfopost heat/ cool delivery. Vinyltek triple pane windows & Thermatru front door.

All the stormwater from the roof is infiltrated back into the onsite soils via a huge infiltration trench. Additionally, the excavation soils all remained onsite to reduce soils trucking. The clients took responsibility for seeding the exposed construction soils, choosing to plant a complex cover crop in place of the usual grass. The cover crop can be tilled back into the soils to impart nitrogen & other nutrients when a new planting regime is decided upon.

The house in a garden is a traditional family way of life and TC is proud to have built a modern, dense & flexible version of this ideal, updated to make all its own power to address the demands of the climate-change world.

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Trax

by Senna | Apr 16, 2020

This 2,540 square-foot clerestory (one-and-a-half story) family house has an integrated, differently heat-zoned 1,040-square-foot garage and woodshop sitting within the SIPs shell. It was built in 2020 in western Washington.

A rigorous passive-solar window design uses the majority south-facing glazing for wintertime heating, shaded in summer by a shallow south porch and accurate south clerestory overhang. Multi-direction daylight penetrates and reflects deep into the connected main living space and second-floor balcony via the high second-floor clerestory glazing.

Multiple cutting-edge HVAC and home-automation systems integrate to deliver low-cost air-to-water heat pump-based central heating, cooling, and fresh-air delivery, triggered via automatic carbon-dioxide and humidity sensors. Alexa-driven automated lighting and blinds are installed, a home-automation system that will expand in its capabilities as more options become available.

The clients’ requirement for a spacious first-floor master suite led us to design a smaller second floor in relation to the first. The clerestory design accommodates this layout by producing a daylight-rich one-and-a-half-story house.

Specifications

U.S. Department of Energy Net-Zero certified
Chilltrix CX34 air-to-water heat pump
Zehnder 550Q heat recovery ventilator (HRV), with in-line fan coil from Chilltrix
Development dedicated 1 acre of pastureland to a perpetual conservation easement, ensuring growth of native species
12.4 kW of solar panels installed
6.5” R-29 SIPs walls
12.25” R-59 SIPs roof
4” R-20 foam under 4” concrete slab-on-grade for excellent thermal mass
5.5” foam (total) R-23.8 insulated concrete forms (ICF) perimeter stem-walls
Vinylek Boreal series triple-pane windows (U values between 0.14 and 0.16)
1:1.6 aspect ratio floor plan, with long side facing south
Minimal east and west glazing

Columbia City

by Senna | Apr 16, 2020

These two 2,250-square-foot, three-story family houses were built adjacent to each other, without garages, on a single lot in Columbia City, Seattle. The design preserved enough space for two spacious gardens.

This perfect urban lot has great southern exposure for passive and active solar gain. The small 25′ by 30′ footprints raised a surprising amount of internal space, but achieving net-zero performance, even with super-insulated SIPs panels, necessitated an enlarged south roof to house the required solar panels. We designed huge, cranked south roofs. This was a first for TC Legend, but they are now standard, architecturally a truly modem aesthetic response to the climate crisis.

The five-bedroom houses are planned to maximize common spaces and contain one un-programmed loft/rec-room space on each floor: space for a drum kit, a wine bar, a sewing room, or another TV room. Additionally the first floor has a big mud room to house bikes and camping gear and function as the storage space that a suburban house would normally have in the garage, which we eliminated in favor of gardens and uncovered off-street parking.

Specifications

Department of Energy Net-Zero certified
Chilltrix CX30 air-to-water heat pump
100% storm-water infiltrated on site via two infiltration pits
12.4 kW solar panels installed
6.5” R-29 SIPs walls
10.25” R-59 SIPs roof
4” R-20 foam under 4” concrete slab-on-grade for thermal mass
5.5” foam (total) R-23.8 insulated concrete forms (ICF) perimeter stem walls
Plygem triple-pane windows (U values between 0.21 and 0.24)

Larson

by Senna | Apr 16, 2020

This 2,020 square-foot two-story, five-bedroom family house was built in rural King County. It has an additional 280 square-foot integrated single-car garage within the SIPs shell. The garage can be re-purposed into a flex space, such as a kids’ TV room, playroom, workshop, etc. The home was built in 2018 in western Washington.

The major challenge with this undeveloped site was to dig the potable water line 1,000 feet through a boulder field. The client miraculously located the well stub within the forest, and the TC Legend team dodged and weaved the waterline through.

Additionally, we carved the driveway 500’ through the second-growth forest, located the house for optimum solar exposure, and laid the power line in the middle of the driveway, with septic adjacent under what will likely become a forest lawn. A truly stunning site with stag deer, bear, cougars, and more.

The wrap-around porch with concrete walkway mediates between the inside and outside, with a front mudroom to contain kids’ messes and offer an airlock to prevent large temperature drops when the front door is opened in winter.

The house was prevented from becoming overly large and expensive by sizing the kids’ bedrooms at kids’ scale: on the small side of things. However, the vaulted SIPs ceiling at the second floor, which is a standard feature of SIPs construction, presents a very spacious overhead feel. Additionally, multiple windows in many bedrooms ensures that the kids rooms don’t feel boxy.