Colleges and universities in Michigan sent Tim Allen sweaters and t-shirts to wear on the air, and he did.

The character Wilson was based on Tim Allen's childhood memories of when he was too short to see over a fence, and was therefore unable to see his neighbor.

Originally, Frances Fisher was cast as Jill Taylor. During the filming of the pilot, audiences reacted poorly, saying that she made the character of Jill whiney and desperate. She was replaced with Patricia Richardson four days before the pilot episode was taped.

According to E! True Hollywood Story (1996), Tim Allen was offered $50 million to do a ninth season of the show, and Patricia Richardson was offered $25 million.

The "Tool Time" audience was the actual live studio audience.

When the show went into syndication in 1995, the producers chose to film a new episode to kick-off the syndicated episodes, a first for a network series. Tim Allen and Patricia Richardson filmed part of the episode at the Marine Corps Air Ground Combat Center in Twentynine Palms, California. In this episode, their characters had a race, driving tanks on a mapped out course. Many Marines of 1st Tank Battalion were then invited to the studios in Los Angeles to watch the filming of the rest of the episode, live from the studio audience.

There is a running gag regarding the Taylors' neighbor, Wilson; his face is always concealed from about the nose down (except in one episode where the top half of his face is covered with papier mache). In most episodes, Wilson was being shot from behind a fence. In later episodes, where he got out more often, camera shots, actor movements, and prop placements were carefully orchestrated so as not to reveal his full face. In fact, during all the curtain calls for the show, except the series finale curtain call, where his entire face was shown, actor Earl Hindman, who played Wilson, would bring a miniature picket fence to hold in front of his face.

While taping some episodes of Tool Time, Tim sometimes asks an unseen character, Klaus, to play music for Tool Time segments. Klaus Landsberg worked in the sound department on this show.

Almost all new Binford products introduced on Tool Time have the model number 6100.

The show was originally conceived under the name "Hammer Time", after the show Tim would host. Prior to filming the pilot, Tim's show was re-named "Tool Time" to avoid confusion with M.C. Hammer. Consequently, the show was re-named "Home Improvement" because the creators decided against naming the show after the show-within the show, to avoid confusing viewers.

Binford Tools, as promoted by Tim on "Tool Time", was featured in Toy Story (1995), which also starred Tim Allen. It can be seen in the scene when Woody is trying to help Buzz escape from Andy's evil next door neighbor's room. Woody pushes a red toolbox off the side of the counter and when the toolbox comes into the shot, you can see the Binford logo on the toolbox.

The character "Tim Taylor" was ranked number twenty in TV Guide's list of the "50 Greatest TV Dads of All Time" (June 20, 2004 issue).

Patricia Richardson gave birth to twins three months before she began filming. In fact, she brought her twins to her initial interview and the producers built a nursery in the studio for them.

The last U.S. broadcast network sitcom to be videotaped.

Al's name was originally going to be Glenn.

A Super Nintendo video game was based on the television series. As part of the game's gimmick, the majority of the instruction manual was blanked out with the words "REAL MEN DON'T NEED INSTRUCTIONS." The game was only loosely based on the show, and featured Tim fighting through various television sets in the Tool Time studio. The battles consisted of Tim fighting with men dressed up like dinosaurs.

Sadly, Earl Hindman (Wilson) died of lung cancer on December 29, 2003.

On the show, the actual ages of each of the characters are the following: Brad is 11, Randy is 10 and Mark is 6. The oldest brother Brad, is thirteen months older than the second brother, Randy. However, in reality, Zachery Ty Bryan was 10, Jonathon Taylor Thomas was 10, and Taran Noah Smith was 7. Jonathan Taylor Thomas, who played Randy, is older by a month and a day than Zachery Ty Bryan, who played the eldest brother, Brad. Since Bryan was considerably taller than Thomas, it gave the illusion that he could be passed off as the older brother. In later seasons, Taran Noah Smith, who played Mark, the youngest brother, had a height advantage over Thomas.

One of the few family sitcoms that didn't feature a frontal shot of a real house to be used as the house of the television family.

In Germany, the series' title is "Hör mal wer da hämmert" means "Listen Who's Hammering", an allusion to the German title of the movie "Look Who's Talking".

Al is seen wearing a wedding ring on his left hand even though the character is portrayed as unmarried. In real life, Richard Karn is married to Tudi Roche, who had a recurring role as Jill's sister Carrie.

As an homage to this show, many tools seen in Tim Allen's later project, Last Man Standing (2011), were "Binford"-branded.

The name Binford in Binford Tools, the company that sponsors the Tool Time show, comes from a family's last name that one of the producers has befriended.

In 2017, a podcast dedicated to the show Home Improvement (1991) called "Grunt Work", was launched. It had taken its name from Tim Allen's iconic "primitive man" routine, wherein every episode of the show was covered with in-depth analysis.

Producer and director John Pasquin directed Tim Allen in The Santa Clause (1994), Jungle 2 Jungle (1997), and Joe Somebody (2001).

Ashley Judd auditioned for and won the role of Lisa, the Tool Girl. Her agent urged her to pursue movies instead of a television career, and she pulled out a few days before the original pilot was to be taped. This resulted in the casting of Pamela Anderson. The last-minute change necessitated alterations to the original script, in which Lisa was a major character. She was suppose to be a college student, majoring in psychology, who acted as a stand-in for Jill on the Tool Time set.

Stephen Tobolowsky was the original choice to play Al Borland; but due to a film commitment, Richard Karn got the part of Al after filming four episodes.

The label WLS was frequently used to cover up real corporate logos. These were the intials of the series' original property master, Warren Schaffer; the call letters of the ABC owned and operated affiliate station in Chicago, Illinois, and of two radio stations in Chicago owned by Citadel, who bought ABC's radio division.

Dave Chappelle and Jim Breuer guest starred as "Dave" and "Jim" in S4 E20, "Talk To Me," which first aired in 1995. Chappelle and Breuer co-starred in the film "Half Baked" released in 1998.

Although Mark's middle name isn't mentioned directly during the series, it was mentioned by Tim in one post-finale interview that Mark's middle name is Jason.

It is mentioned that Tim's mother, Lucille Taylor, raised five boys (including Tim) by herself. However, during the run of the show, seven brothers of Tim's are mentioned by name: John, Rick, Steve, Brian, Danny, Jeff, and Marty.

During the run of the show, Jill is mentioned as having the following sisters: Carrie, Robin, Tracy, Linda, Carol, and Katie.

During the closing credits of one show, Tim is seen showing off a Buzz Lightyear toy to a little girl; he provided the voice of Buzz Lightyear in the Toy Story film franchise.

Patricia Richardson, whose father was a Navy veteran, and Tim Allen were both big fans of the military. Because of their fondness of the Navy, they invited the Blue Angels to sit in on one of their rehearsals. Jimmy Libriola kept the Blue Angels busy, cracking jokes with the team.

It is said in one episode that Tim Taylor is three years older than his wife, Jill (Patricia Richardson). However, in real life, Patricia is two years older than Tim Allen.

For one week in November 1994, while the series was #1 in the Nielsen ratings, Tim Allen also had the #1 movie at the box office (The Santa Clause (1994)) and the New York Times' #1 best-selling book ("Don't Stand Too Close to a Naked Man").

While meeting with Bud Harper, Tim is told "...Heidi tested better than Santa Claus." Tim Allen played Santa Claus in The Santa Clause (1994).

An actual graduate-level textbook, "The Assessment of Children (3rd Ed.)" written by Jerome Sattler, was shown while Jill was studying.

Lucy Liu appears as an audience member in S4 E16 "Bachelor of the Year."

Jonathan Taylor Thomas who played the middle son Randy Taylor is actually one month and one day older than Zachary Ty Bryan who played the oldest son Brad Taylor.

Throughout the course of the show the kitchen phone changes repeatedly. In the first season alone you see 3 different phones.