Kevin O’Connor
Host
The face of the show since 2003. Kevin brings the homeowner’s perspective — curious, practical, and always asking the questions viewers would ask—to every project.
Going everywhere, including the extra mile, to answer homeowner questions, Ask This Old House enters its 25th season with gusto. The team continues to show the enthusiasm, expertise, and willingness to help that they have possessed since the very first season. Keep asking those questions, homeowners. The AskTOH trailer may roll down your street soon.
Meet the Experts
The knowledge base of the AskTOH team is what makes the show truly remarkable—that and the fact that these top tradespeople actually make house calls. From Tom Silva’s generations of contractor experience to Richard Trethewey’s DNA for HVAC intelligence, the team meets every challenge by doing things the right way.
Tom Silva
General Contractor
The gold standard of general contracting since 1986. Tom’s encyclopedic knowledge of building — from foundations to finish work — has been a show cornerstone from the start.
Richard Trethewey
Plumbing & Heating
The plumbing and HVAC authority since 1980. A fourth generation master plumber, Richard has a gift for explaining the invisible systems inside homes in ways that actually make sense.
Mauro Henrique
Painter
The eye for detail behind every finished room. Founder of Mauro’s Painting in Boston, Mauro’s work turns rough surfaces into standout results — sharp lines, clean coats, no shortcuts.
Jenn Nawada
Landscape Contractor
A Massachusetts Certified Horticulturist and founder of Nawada Landscape Design, Jenn demonstrates landscape design and installation techniques that turn ordinary yards into sophisticated, sustainable outdoor spaces.
Nathan Gilbert
Carpenter
One of the first Generation NEXT apprentices, Nathan brings finish-carpentry skill passed down through his family along with five years of service as a Navy Seabee to every repair and improvement.
Mark McCullough
Mason
Owner of MJM Masonry since 1992, Mark demystifies the world of stone, brick, and concrete for millions of viewers, drawing on decades of historic renovation work throughout Boston’s oldest neighborhoods.
Heath Eastman
Master Electrician
A master electrician and co-owner of Eaton and Eastman Electric, Heath tackles everything from fixture installs to complex rewires while making the technical side of electrical work easy to follow.
Ross Trethewey
Building Engineer
Founder of TE2 Engineering and a licensed mechanical engineer, Ross brings expertise in high-performance HVAC, renewable energy, and sustainable building technology as the third generation of his family on the show.
Lee Gilliam
Landscape Contractor
A self-taught, first-generation landscaper with over 35 years of experience, Lee founded Gilliam and Sons Landscaping and is known for his meticulous detail work and dedication to mentoring the next generation.
Zach Dettmore
General Contractor
Founder of Dettmore Home Improvements and a general contractor for nearly 20 years, Zach brings his carpentry skills and organization to every project.
By the Numbers
Ask This Old House has racked up impressive stats during its 25 years on the air. Literally countless: the number of times a perplexed homeowner has found the info they need. The team is always there.
1,000+
House Calls
From fixing uneven stairs and repairing leaky faucets to aerating lawns and installing smart thermostats, the team has gone directly to the homeowner’s residence to solve a problem.
600+
Episodes
During hundreds of episodes, the team has helped and educated homeowners not only with house calls but also with segments such as What Is It, Build It, Tool Lab, and Future House created along the way.
1
Virtual Trip to Outer Space
On Ross Trethewey’s Season 17 visit to NASA Johnson Space Center, he talked in real time to astronauts on the International Space Station.
50
States Visited
When Tom Silva, Richard Trethewey, and Roger Cook headed to Hawaii at the end of Season 15, they gave the show the distinction of making house calls in all 50 states: Tom examined a Hawaiian keepsake box with beautiful wood grain, Richard looked at storing solar energy a new way, and Roger planted a tropical garden.
3,000+
Expert Tips Shared
Episodes regularly show how to fix a problem, use a tool, understand a mechanical system, identify a plant, and more—advice real homeowners use.
300
Years of American Houses
From the beehive oven Mark McCullough fixed in a 1750 house and the window balancers Tom Silva repaired in a 1757 house to the 2025 3D-printed house that Ross Trethewey visited, the team has traveled to houses spanning three centuries.
14
Emmy® Award Nominations
In 2019, Ask This Old House took home the Daytime Emmy® for “Outstanding Lifestyle Program.” The show has 14 total nominations, including two current nominations in the categories of ‘Outstanding Instructional / How-To Program’ and ‘Outstanding Writing for a Daytime Non-Fiction Series.’
All 50 States
From the very first season, the team has traveled to answer questions, initially staying fairly close to the show’s home, a barn in Concord, Massachusetts, but eventually rolling down the road in every state across the country in the now-familiar Ask This Old House trailer. Check out the visits to your favorite states here.
Bonus Content
Holiday Cheer Starts Here
Refresh For Fall
Fall Prep Checklist
Summer Grilling Tips
Garage Storage Tips
Timeline
Milestones have abounded since Season 1’s original team of Tom Silva, Richard Trethewey, Roger Cook, and then-host Steve Thomas started answering homeowner questions. With the October 2026 debut of Season 25, the team now includes 11 experts to answer each call. Here are the aha moments from the home improvement show that goes anywhere.
Playlists
Twenty-five years of house calls make for a lot of favorites. Here, the AskTOH cast and crew look back on the projects that stuck with them, plus a special anniversary episode celebrating the moments that made the show what it is today.
Favorite House Calls
By Cast Member
24 Episodes
We asked each of our Ask This Old House crew for their favorite projects. Here’s their answers.
Watch on YoutubeCast Favorite Episodes
Fan Favorites
Special 90 Minute Episode
To celebrate the 25th Anniversary of Ask This Old House, our cast and crew want to share their Top 25 favorite house calls and what they loved about them. Here’s what they said!
Watch on Youtube
Anniversary Coverage
The industry has taken notice of 25 years of house calls. From trade publications to local news, here’s a roundup of the stories being told about AskTOH’s milestone season.
Beloved PBS Series to Return for 25th Season This Fall
Parade
Read MoreAsk This Old House Season 25 to Premiere on October 1
MSN
Read MoreAsk This Old House to Mark 25th Season on PBS With New AI Tool
BroadwayWorld
Read MoreEmmy Award-Winning Ask This Old House Celebrates 25th Anniversary of Building Confident Homeowners
The Futon Critic
Read More