Mountainside sits in Garrett County, just outside Oakland, and what trades here is overwhelmingly houses on their own lots. This is a small market, so the range you meet is the range a handful of sales gives you: detached homes of a similar era, sold one at a time, each with its own lot to maintain. Buyers who want somebody else handling the outside will not find much of that here. Bell | Fenton Luxury Real Estate Sales Team works this pocket of the county and knows how thin the listing pool can be from one month to the next, and what the houses in it tend to ask of an owner.
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Mountainside at a Glance
- County
- Garrett County
- ZIP codes in these listings
- 21550
- Typical sold price
- $815,000 (median of 11 home sales, excluding 1 land and other non-dwelling sales, past 12 months)
- Typical home
- 3,304 sq ft (n=11) · 4 bed / 4 bath (medians, n=11)
- Months of supply
- 4 (leaning to sellers)
- Sold-to-list
- 96.1% of asking (median per home sale, n=11)
- Data current as of
- October 2026
How the Mountainside market is moving
Start with the supply picture: the months-of-supply figure here falls on the seller-leaning side of the scale. That is a ratio of what is listed against how quickly homes have been selling, so treat it as a description of the current balance and nothing more.
On closed sales, homes went for a little under their asking price. Half of them closed at least $49,000 below what was asked. That is history, not a formula, so use it to understand what has happened here rather than to script an offer.
Nearly all of the homes for sale in Mountainside are houses, so build your search around detached property and plan to look at lots, roofs and yards rather than fees and shared walls.
What you own in Mountainside
The typical house here was built around 2003. At that age, the first round of big-ticket replacements has either been done or is coming due, so ask directly about the roof, the furnace and the windows, and when each was last touched. A seller who can give you dates is handing you a maintenance calendar for the next several years. Everything outside the walls is yours too: the lot, the yard, the drive, with no fee and no one else scheduling the work. Fulcher P. Smith Conservation Area is a short drive from Mountainside, which is worth knowing if the land around a listing matters as much to you as the house on it.
What to check before you make an offer
- Flood zone designation for properties near creeks or lake.
- Short-term rental and zoning restrictions.
- Property tax assessment and any special taxing district.
Working with Bell | Fenton in Mountainside
Two things on this page are easy to misread: how close sales here actually run to the asking price, and the water and tax questions that attach to specific parcels near the lake and creeks. Bell | Fenton Luxury Real Estate Sales Team works these transactions in Garrett County and can read a closed sale properly, line up the flood and taxing-district questions on a given address, and tell you which parts of a listing need confirming before you write anything. If you want it, they will set up alerts for detached houses in Mountainside and walk through each one with you as it comes up.
