How-to guide
Will my boat fit in the garage? How to measure both
"It should fit" is how people end up with a boat in the driveway. Ten minutes with a tape measure gives you a real answer.
Short answer
Your boat fits if three things are true. Its overall length on the trailer is at least a foot shorter than the garage's clear depth. Its height on the trailer is a few inches less than the lowest point it must pass under, which is often the open door, not the header. And its widest point is at least a foot narrower than the door opening. Measure the boat on its trailer, not from the brochure.
Step 1: Measure the boat on its trailer
Park on level ground with the boat loaded the way you store it.
- Overall length. Run the tape from the front of the coupler to the farthest point back. Check the swim platform, the outdrive and the prop. Write down the longest. If your tongue folds, measure it folded too.
- Height. From the ground to the highest point. Do it with the tower up. Then fold the tower and measure again. Include board racks, speakers, lights and the windshield.
- Width. Find the widest point. On most boats it is the trailer fenders or guide posts.
Step 2: Measure the garage
- Door opening height. Open the door all the way. Measure from the floor to the bottom edge of the open door. This is usually lower than the header.
- Door opening width. Side to side, at the narrowest point.
- Clear depth. Close the door. Measure from the inside of the door to the back wall, or to whatever sticks out from it: a step, a water heater, shelves.
- Lowest point inside. Look for the opener rail, the motor, lights and ducts along the path the boat will take.
While you are there, note the floor. A step up into the house at the back, or a floor that slopes, changes the usable depth.
Step 3: Leave margins
A boat that fits with half an inch to spare does not fit in real life. These margins are a sensible minimum.
| Dimension | Compare | Margin to leave |
|---|---|---|
| Length | Overall length against clear depth | At least 1 foot, more if you want to walk around the bow |
| Height | Height on trailer against the lowest point | At least 3 inches. The trailer bounces as it crosses the threshold. |
| Width | Widest point against door opening | At least 6 inches a side |
A worked example
| The boat | The garage | Result | |
|---|---|---|---|
| Length | 27 ft 4 in on the trailer | 30 ft 0 in clear depth | Fits, with 2 ft 8 in to spare |
| Width | 8 ft 6 in at the fenders | 10 ft 0 in door | Fits, with 9 in a side |
| Height, tower up | 10 ft 8 in | 8 ft door, 7 ft 9 in under the open door | Does not fit |
| Height, tower folded | 7 ft 10 in | 7 ft 9 in under the open door | Does not fit, by 1 inch |
On paper this is a "23-foot boat" and a "30-foot garage with an 8-foot door." It sounds like an easy yes. It is a no, because of one inch of garage door hanging below the header.
That is why the measurements have to be taken in person.
Step 4: Check the approach
Fitting inside is not the same as getting inside.
- The slope change at the door. If the driveway rises to a flat floor, the boat tilts as it crosses. The tower swings higher for a moment and the back of the trailer drops.
- The turn. Can you back in straight, or is there a wall, a mailbox or a parked car in the way?
- The driveway length. Is there room for the truck once the boat is in?
Ways to gain a few inches
- Fold the trailer tongue, if yours swings away.
- Fold the tower and remove board racks or a light bar.
- Lower or remove the bimini frame.
- Trim the outdrive down if that shortens the overall length on your setup.
- Ask a garage door company whether a high-lift conversion or a side-mount opener would raise the door and clear the ceiling.
If it still does not fit, the choice is a different home, side parking or a slip. The guide to Lake Havasu boat garage homes covers each one.
Questions buyers ask
How much longer is a boat on its trailer than its stated length?
Often three to six feet longer. The trailer tongue adds length at the front, and the swim platform, outdrive or prop adds length at the back. The only reliable number is one you measure yourself.
Does a swing-away tongue help?
Yes. Folding the tongue commonly saves two to three feet, which can be the difference in a garage that is close. Measure with it folded and unfolded so you know both.
Why does my boat clear the header but not the door?
An open sectional garage door hangs a few inches below the top of the opening on most installations. Measure from the floor to the bottom edge of the door when it is fully open. That is your real clearance.