powerhouse designs - TC Legend Homes

2602 Woburn

by Senna | Dec 10, 2025

2602 Woburn

Originally designed to be co-housing with the intent of multiple family units buying/rent in, this home is ahead of its time. The first floor was designed for aging-in-place with all the necessary home components to accommodate someone with mobility impairments, while the second floor has 4 additional spacious bedrooms for a wide variety of room layouts and uses along with 2 full bathrooms. Both floors also have washer and dryer hookups. 2602 Woburn is perfect for a large or multi-generational family unit, or a group of friends.

Located walking distance to a main shopping/eating/recreation center and with a main bus stop right outside, this home doesn’t need a garage and encourages transportation by foot, bike or public transportation.

Specs

Overview:
- 2000sf SFR
- 5 bedroom, 3 bathroom
- Net Zero Energy
- Passive solar heating/cooling design
- Insulation: R-29 walls & R-45 ceiling
- Air Sealing: 0.34ACH
- HERS Index: -4
- Certifications: DOE Zero Energy Ready Home certified, ENERGY STAR certified, EPA Indoor airPLUS certified, anticipated Built Green 4-star certified
Mechanical:
- Ventilation: Fantech Hero 250 with built in HEPA filter. Built-in humidity, temperature, and CO2
- Heating/Cooling: Chilltrix CX-50; hydronic radiant floor heating downstairs and 1 fan coil unit
- PV: 9.84kW solar array
Selections:
- Hardie lap and panel siding
- Cedar siding and posts at entry
- Taylor Metal Easylock steel roofing
- Rotary birch & VanAir doors
- Hemlock trim
- Acid stained concrete at first floor
- FloorScore certified laminate flooring on second floor
- Locally made custom maple-ply cabinets
- Quartz countertops
- LED lighting
- WaterSense faucets and toilets
- ENERGY STAR appliances and induction range
- Balanced range hood
- No/Low-VOC finishes
- Triple pane, Low-E coated, argon-filled locally manufactured vinyl windows

The Gravel Pit

by Senna | Sep 24, 2025

The Gravel Pit

Sitting in an old quarry gravel pit turned gated community, this home was built to be a couple’s forest hide-away. Designed to mimic the Fox Net Zero Home, it features an aging-in-place first floor and clearstory second floor. Due to the CC&Rs in this community, the owners were required to build a home at least 2,500sf big but did not need all that space. The solution was to create a second floor loft that was designed to be converted into several bedrooms by future homeowners, should it be needed.

The build was completed beautifully by our field crew, with love and attention put into every detail.

Specs

Overview:
- 2500sf SFR with 624sf garage
- 2 bedroom, 2.5 bathroom
- Net Zero Energy
- Passive solar heating/cooling design
- Insulation: R-29 walls & R-49 ceiling
- Air Sealing: 0.37ACH
- HERS Index: -28
- Certifications: DOE Zero Energy Ready Home certified, ENERGY STAR certified, EPA Indoor airPLUS certified, anticipated Built Green 5-star certified
Mechanical:
- Ventilation: Fantech Hero 250 with built in HEPA filter. Built-in humidity, temperature, and CO2
- Heating/Cooling: Chilltrix CX-34; hydronic radiant floor heating downstairs and 2 fan coil units
- PV: 13.02kW solar array
Selections:
- Hardie lap siding
- T&G cedar siding and soffits at entry
- Taylor Metal Easylock steel roofing in Cool Roof certified white
- Rotary birch doors & hemlock trim
- Acid stained concrete at first floor
- GreenGuard Gold Bamboo Flooring – EcoForest Mocha Locking Stranded Bamboo
- Custom Plyboo cabinets
- Custom stainless-steel countertops in kitchen
- LED lighting
- WaterSense plumbing fixtures
- ENERGY STAR appliances
- Balanced range hood
- No/Low-VOC finishes
- Triple pane, Low-E coated, argon-filled vinyl windows

Forest Run

by Senna | Sep 27, 2024

Forest Run

Out on a secluded lot in the County, Forest Run home is a peaceful retreat for retirement. The lot entices you to pull up a chair and just listen to the birds, frogs, bugs and furry critters in the surrounding forest. Once inside, you feel a sense of coziness by the warm-toned finishes, but still have a great connection to the idyllic nature surrounding the home through the large and strategically placed windows.

Unfortunately, during excavation the foundation trench became a big muddy pond due to the clay-rich soil. This resulted in many days suited up in waders and rubber boots. During the foundation pour, we made the choice to use less fly ash in the concrete mix than we would normally because of the cold temperatures and soupy ground. For context, we try to use as much fly ash as we can to reduce the foundation’s embodied carbon. But sometimes compromises have to be made in order to create a more robust structure.

Overall, Forest Run was a fun project to do, with some twist and turns along the way. We are so honored to have built our second-time client another home!

Specs

Overview:
- 1234sf SFR & 1152sf unconditioned garage/shop
- 2 bedroom, 1 bathroom + bonus loft
- Net Zero Energy
- Aging-in-place design
- Passive solar heating/cooling design
- Insulation: R-29 walls & R-45 ceiling
- Air Sealing: 0.46ACH
- Certifications: DOE Zero Energy Ready Home certified, ENERGY STAR certified, EPA Indoor airPLUS certified, anticipated Built Green 5-star certified
Mechanical:
- Ventilation: Fantech Hero 250 with built in HEPA filter. Built-in humidity, temperature, and CO2
- Heating/Cooling: Fujitsu 18RL mini-split
- PV: 5.04kW solar array
Selections:
- Cedar siding & soffits
- Lifetime warrantied asphalt roof
- Fir trim & doors
- GREENGUARD Gold certified oak flooring
- Custom maple plywood cabinets
- Quartzite countertops
- LED lighting
- WaterSense plumbing fixtures
- ENERGY STAR appliances
- Balanced range hood
- No/Low-VOC finishes
- Triple pane, Low-E coated, argon-filled vinyl windows

Fox Net Zero House

by Senna | Nov 28, 2023

Fox Net Zero Home

Started in the winter, building the Fox Home was not without its challenges, but the challenges ended up working in our favor in the end and producing this beautiful and unique home. Right off the bat, after we poured the concrete slab, the weather turned and frosted. As we saved the slab from freezing using plastic sheets and hay, the wind kicked up and caused the hay to come into direct contact with the slab as it was curing. The hay interacted with the concrete and caused what turned out to be really cool color undulations which add to the home’s character. Now we are intentionally adding this option for future clients who want some extra pizzaz in their concrete floors!

We always love when clients add their personal touches to a home as well, and in this case that personal touch was in the form of a repurposed trash receptacle laundry chute!

Specs

Overview:
- 1978sf SFR & 876sf garage
- 4 bedroom, 2.5 bath SFR
- Net Zero Energy
- 1st floor aging-in-place
- Passive solar heating/cooling design
- Insulation: R-29 walls & R-45 ceiling
- Air Sealing: 0.18 ACH50
- HERS Index: -2
- Annual Energy Cost Savings: $2,800
- Certifications: DOE Zero Energy Ready Home certified, ENERGY STAR certified, EPA Indoor airPLUS certified, anticipated Built Green 5-star certified
Mechanical:
- Ventilation: Fantech Hero 250 with built in HEPA filter. Built-in humidity, temperature, and CO2
- Heating/Cooling: Chilltrix CX-34; hydronic radiant floor heating downstairs and fan coil unit
- PV: 9kW solar array with Enphase microinverters and battery ready
Selections:
- Thermatru exterior doors
- Certified Cool Roof metal roofing
- Birch doors and hemlock trim
- Floor Score certified vinyl flooring & zero-VOC, anti-microbial underlayment
- Quartz countertops
- Thrifted plumbing fixtures
- Europly maple cabinets
- LED lighting
- WaterSense plumbing fixtures
- ENERGY STAR appliances
- No/Low-VOC finishes
- Triple pane, Low-E coated, argon-filled vinyl windows

Samish Solar

by Senna | Jul 25, 2023

Samish Solar

Sitting on a stunning 5-acre lot nestled into the woods and surrounded by wildflowers and berries, Samish Solar Home is an oasis for a growing family of mountain bikers and nature enthusiasts.

Along with this home’s solar array making it net-zero, it has an added level of resiliency with its 28,000-gallon rainwater cistern that supplies the house and its fire suppression system with water. The rainwater is filtered through a sediment filter, activated carbon filter, and UV filter to ensure it is fit for domestic use.

Built using TC Legend’s tried-and-true methods, Samish Solar Home exemplifies what our construction strategies can produce. Just look at these stats!

Specs

Overview:
- 2345 sqft heated living space & 234 sqft unheated sunroom
- 1600 sqft barn with 895 sqft loft
- 4 bedroom, 3.5 bathroom
- Net Zero Energy
- 1st floor aging-in-place
- Passive solar heating/cooling design
- Insulation: R-29 walls & R-59 ceiling
- Air Sealing: 0.27ACH
- HERS Index: -20
- Annual Energy Cost Savings: $2432
- Certifications: DOE Zero Energy Ready Home certified, ENERGY STAR certified, EPA Indoor airPLUS certified, anticipated Built Green 5-star certified
- Winner of Housing Innovations Award!
Mechanical:
- Ventiliation: Fantech Hero 250 with built in HEPA filter. Built-in humidity, temperature, and CO₂
- Heating/Cooling: Chilltrix CX-34; hydronic radiant floor heating downstairs and a fan coil unit upstairs
- PV: 10.8kW solar array with Enphase microinverters and battery ready
Selections:
- Timber framed entry
- Locally made cherry cabinets
- Certified metal cool roof
- Greenguard Gold Maple flooring
- No/Low-VOC finishes
- Fir doors and trim
- Triple pane, Low-E coated, argon-filled vinyl windows