Jeff,

I think that Barbara Todaro has the perfect answer.  For us, it is a must.  A

It can be if it is in a price point where one would expect a garage. For those folks who absolutely will not live without one, then it's a non starter. In our area, though, it is not an expectation until you get to a certain price point. 

It is streamly detrimental in my area.

EVERYONE wants a house with a garage.

Some can not afford a house with a garage.

In Florida, uncovered parking is brutal on a car. Many houses with spacious two car garages have the cars in the driveway. 

Moral to the story: They would rather the car sit in the sun than do away with their stuff.

Can they overlook a house without a garage? Depends on how much stuff they have.

Detached vs attached:

Older home the lots were deeper. Right after 1945 or so the developers turned it around. I suspected attached garage were cheaper to built. 

Garage vs carport:

Acceptable so long as location is good.

No garage:

In San Jose many home owners converted to a living or bed room and claimed the additional space as sf.  Harder to sell.

It totally depends on the buyer and the price range. Low budget buyers are usually willing to give it up if they have to thinking they could build a detached garage later.

Very few homes here have garages, but we are up 8 ft on pilings so everybody just parks under the house.

It's definitely an issue in my market.  Except for the lowest price ranges and for some condos.

I believe not having a garage would be a real problem here in selling it at a later date.  I very seldom get a request to show a property without a garage so the resell future would be a problem unless priced much lower. 

Depends on price range and neighborhood.  My 1950's house had one car garage so we built carport next to it for second vehicle.  Guess which one I use!

Lack of a garage is a big issue here. We have severe storms and in the winter hail storms which damage cars. Also for many it is also a question of security.

Newbies want garages

It some areas a attached garage is a necessity but in many of my areas the garage-less house will be around $15k - $20k cheaper. In Seattle, they want everyone to take public transportation so garages are rare in new construction. 

Not really, but most prefer a garage of some sort.

In certain areas most of the garages have collapsed or are so old a vehicle will not fit in them. The ones with no garage generally have a shed to put seasonal items away or hold a lawn mower.

In the suburbs except for the towns most expect a garage.

Most buyers in this area expect a two car and many prefer a three car garage.

first time buyers can overlook it..... 

Stuff happens.  Most people prefer a private garage.   

Newer properties have garages, some older properties have car ports, or just slab

Detriment for sure!

A garage is one of the 'Wants' for most buyers with the exception of condos on the beach. Those buyers will jump on anything for sale.

Most want a garage.

Parking is extremely important in Los Angeles. Clients always ask how many spaces come with the property and might pass on the property that does not provide any parking at all. 

Most people want a shed, barn or garage in the country.  In town, depends on the neighborhood and type of buyer.  

A definite detriment in central Washington State.

Most buyers with cars just want some sort of parking space.  Some insisit on a garage, but most just don't want to drive the streets searching for parking.

nah, less than 20% of homes here have garages.

Most buyers want a garage. 

Most people I work with want a garage.  Most want the garage attached. 

It really depends on the buyer client.  If they are buying a house on a larger piece of land -- no problem because they can build in the future.  But then there are some lovely Historic Homes in our area that have very small lots -- it's a detriment to a buyer buying in this price range if there is no garage, and so most of those buyers choose to go elsewhere.

It is a detriment, and sometimes a one car garage is a detriment also.

I have seen carports sell, parking spaces and garages with appropriate price

For me it is very necessary. Many south Floridians don't care that much since we have awesome weather. I was at a $3.9M property on Tuesday-no garage.

It depends upon the area and what the buyer is looking for.  For example, many new condo projects in certain neighbourhoods have far fewer parking spaces than there are units in the condo project and those projects are intentionally designed that way.

not here... no garage no sale. in the downtown its ok, sort of. in the suburbs it would be a no no

Most prefer a garage

Jeff Dowler CRS It depends on the price point. Many of the older homes do not have garages.

Huge detriment in our area.  How do you make it through the winter?  Also, 1 car garages are a big detriment.

Usually around here no garage no sale.  It does happen but not often

Garages are 'YUGE' on the Beautiful Colorado River. 3:) Where a boat can cost more than the house. And it gets to 120+ in Summer. If a buyer overlooks it, they need to be prepared for a lower resale value down the line. RV garages add big desirability to homes, esp. in HOA subdivisions that don't allow street parking.

It really depends on the area, and the Buyer. 

It does add value.

Garages are very important in our area.

Jeff,
We have enough cold, snow and wind that an attached garage is a must.

Jeff - Most newer homes are built with garages, but homes built prior to 1990 may only have a carport, are less expensive, and can be overlooked by the buyer.

Out here you have to have some form of covered parking (building code).  Me, I hate parking outside so a garage is paramount.  I'm "security minded" so I don't like taking EVERYTHING out of my car when I park outside (and I have a lot of stuff in my car!).

It really is unless buyers are committed to specific parts of town where houses were built at a time when garages were not the norm. Increasingly we see more and more demand for 3-car garages versus 2-car even in more modestly priced homes. We have very few basements in our area, so garages are critical for storage not just car parking.

I don't think anything is a detriment, if you have the right buyer. Some first time buyers can overlook things like that, (as I did), but I think once you are older, you are more demanding of what you want in a house. Any house can sell, if you have the right buyer for it.