Garage Addition

[junebug77]

Hi all! We currently have a 3 car att garage, but that means our daily drivers get parked in the driveway, which isn't great in the midwest winters and spring. We've been looking for over a year for a property with a pole barn, but can't find that combo of a great house + great building. So, now we're looking at a couple of properties in which we may be able to add onto the existing attached garage.
I have NO IDEA how much something like this might cost. I certainly understand there are tons of variables, and much depends on location. Before getting a estimates (which we're weeks out from anyone reputable begin able to look at them), I was curious if anyone had a ball park estimate based on experience?
On this house, it was built in the 70's with a 2 car attached (24' x 24'). This pic is deceiving as it's a 5,300 sq ft. house. We'd probably go out to the right 1 more bay and then build forward for a 3 car tandem (6 total spaces). This original front of the house is brick (painted) but we'd probably do the garage addition in wood to tie in with the rest of the house. Note- the chimney does not interfere- it is much further back than it looks like and is not to the side of the garage. Also, no issues with setbacks- house is on 5 ac. and plenty of room to add.

 

[DetachedGarage]

I like the concept! I will have to "attach" my garage as well. It will not be a direct attachment though. The main issue you are going to run into is getting the roof lines to work well, and also snow load. Unfortunately there are just too many variables to even give you a ballpark number.

 

[krux]

I got a quote yesterday for expanding my detach garage. Right now it's a 24x24 and I want to add another 24 feet. The price is 40s to 90s depending on much work. With removing a tree, roots, excavating, concrete, etc just adds up.

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[LB-1911]

Hi all! We currently have a 3 car att garage, but that means our daily drivers get parked in the driveway, which isn't great in the midwest winters and spring. We've been looking for over a year for a property with a pole barn, but can't find that combo of a great house + great building.

So, now we're looking at a couple of properties in which we may be able to add onto the existing attached garage.


I have NO IDEA how much something like this might cost. I certainly understand there are tons of variables, and much depends on location. Before getting a estimates (which we're weeks out from anyone reputable begin able to look at them), I was curious if anyone had a ball park estimate based on experience?
On this house, it was built in the 70's with a 2 car attached. This pic is deceiving as it's a 5,300 sq ft. house. We'd probably go out to the right 1 more bay and then build forward for a 3 car tandem (6 total spaces). This original front of the house is brick (painted) but we'd probably do the garage addition in wood to tie in with the rest of the house. Note- the chimney does not interfere- it is much further back than it looks like and is not to the side of the garage..

You need to familizer yourself with a few terms; easement - setbacks - impervious surface percentage & site plan just to name a few.

Just because it looks to you that you could just add onto it the local authority having jurisdiction aka Bldg Dept may have a different take on the matter.

 

[CombatNinja]

That roofline on the house pictured does not easily lend itself to what you are looking at doing. If you add onto the side it is going to mess with the symmetry of the roofline.

 

[junebug77]

Couple clarifications...
Super familiar with setbacks and local building/permitting. No issues there.
Land is flat and no issues with soil type in this part of the state, although of course some minimal grading could be needed with the site prep.
For a better integration was thinking of a gabled roofline since per one of the replies I agree- won't be able to continue the natural roof line without it looking wonky.

 

[junebug77]

Thanks! At this point any frame of reference is helpful. I am hoping to get it done for around $75k (assuming minimal site work).

 

[Pluribus]

Something I've seen on here a few times (in other peoples' builds) is that it can actually be more expensive to add on to existing vs. building detached. By the time all of the extra work required to partially demo existing, tie in roofs, walls, etc. is taken into account, it might not pencil out. In other cases, it has to be done as an extension to comply with zoning, maximum heights, sizes, etc.

On the house pictured, my gut feel is that a gable roof extension would detract from the aesthetics. Could you add a hip roof with a ridge running perpendicular to the existing ridge? Here we circle back to my first paragraph, but I think it would look much better.

Example: https://extensions.sketchup.com/en/content/medeek-truss-plugin

 

[Roundhouse]

In my town a lot of people do a detached garage and attached it with a beeezeway
Which makes it no longer detached

The city limits detached structures to 25% of the size of the house

I am also looking to build a garage
But my house is round
Has 13 sides , each side is 8 feet long

Gonna be a pain to design a garage that doesn’t look weird

A big square box garage isn’t going to look right

If you got five acres I’d just build a giant garage behind the house

 

[junebug77]

Something I've seen on here a few times (in other peoples' builds) is that it can actually be more expensive to add on to existing vs. building detached. By the time all of the extra work required to partially demo existing, tie in roofs, walls, etc. is taken into account, it might not pencil out. In other cases, it has to be done as an extension to comply with zoning, maximum heights, sizes, etc.

On the house pictured, my gut feel is that a gable roof extension would detract from the aesthetics. Could you add a hip roof with a ridge running perpendicular to the existing ridge? Here we circle back to my first paragraph, but I think it would look much better.


Thanks for the link! I do like that.
I've considered detached. There would be cost for a lengthy driveway if I add it towards the back of the lot though. I could put it more to page north, but then I'd have to clear trees. Attached pic for more reference. That's a horse barn towards the back of the property. I will likely have both quoted. I did find a somewhat handy calculator. However this forum won't let me post it because I don't have enough posts.

 

[Slednut]

I had the same problem, added 30 feet onto my 26x26 attached. I did add living space above, my garage was going to be 1456 square feet and the house was only 1300. The shops ceilings are only 9 feet tall but I'm loving my attached shop.

 

[69gp]

I was in the same position as you. Added one 12' x 50' bay to the side of my existing garage and bumped the back of the existing garage back another 24'. Made for a good size but wish I went bigger.

this is my build still under construction.
https://www.garagejournal.com/forum/showthread.php?t=414284

 

[dglennon]

We live in the Midwest too and having vehicles parked inside is a must for at least 6 months of the year! In 2014 we added 24x30 out the back of existing attached 3 stall garage. Contractor who did the framing and exterior work convinced me to put a regular garage door between the two spaces and I’m really glad he did. Now I can keep projects in the back area and not be interrupted when vehicles come and go. Happy to answer any questions as you consider adding on.


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[jimmie jam]

I did a 600 sf addition about 10 years ago now. You can see in my avatar photo. It has 13 foot ceilings with a rear drive through door. All doors travel to within 6" of the ceiling so I have use of all the vertical space. There was tree removal and demo of half of the existing structure involved along with a new 65' paver drive. Structurally it is over built but the wind code here is tough. My garage doors are triple layer metal and rated at 175mph. The windows are commercial grade impact rated with 9/16" glass. The front is formed and solid poured 4000psi concrete along with every CBS block cavity filled with same. Floor is 6" thick with #5 rebar five feet on center. Extensive electrical with 400 amp service, underground feed and 220. The roof alone was about 10k and the garage doors nearly 10k also. It adds up...I did alot of stuff myself and provided adult supervision over nearly 7 months to complete at the tune of 100k give or take. Hire a good local architect/engineer as they will know all of the local rules and regulations (codes) for your project. Money well spent IMSO. Have fun and good luck.