# 4 KEY Avenue, Frederick, MD 21701

> **TL;DR:** 3bd/1ba single family, $249,900 ($290/sqft), built 1935, 862 sqft. Est. $1,337/mo. Listed 5 days.

## Property at a Glance

| Attribute | Value |
|-----------|-------|
| Price | $249,900 |
| Price/sqft | $290 |
| Bedrooms | 3 |
| Bathrooms | 1 full |
| Square Feet | 862 |
| Year Built | 1935 |
| Lot Size | 8,250 sqft (0.19 acres) |
| Stories | 1 |
| Property Type | Single Family (Other) |
| Status | Active |
| Days on Market | 5 |

## Estimated Monthly Costs

| Category | Amount |
|----------|--------|
| Principal & Interest (20% down, 30-year at 6.5%) | $1,264 |
| Estimated Insurance | $73 |
| **Total** | **$1,337** |

## Property Highlights

- Built in 1935
- 0.19 acre lot

## Description

### Agent Description
This charming bungalow is minutes from Downtown Frederick and major interstates. Great price for a single family home. Fantastic yard with enough space to add a garage. A little "Sweat Equity" will go a long way on this 3 bedroom, 1 bath home. Zoned Commercial/Residential.

## Location

- **Address:** 4 KEY Avenue, Frederick, MD 21701
- **County:** FREDERICK
- **Neighborhood:** NONE AVAILABLE
- **Coordinates:** 39.43096, -77.4066
- **Google Maps:** https://www.google.com/maps?q=39.43096,-77.4066

## Listing Agent

- **Name:** Timothy D O'Boyle · **License:** 603307
- **Brokerage:** Mackintosh Inc., REALTORS
- **Phone:** 2404093151
- **Broker Phone:** (301) 662-0155
- **Listing URL:** [View original listing](https://www.realtor.com/realestateandhomes-detail/4-Key-Ave_Frederick_MD_21701_M64597-09845?f=listhub&s=TRENDPA&m=MDFR2089410&c=propsimple)

## Photos

![4 KEY Avenue - Photo 1](http://lh.rdcpix.com/0a7f50104c856f999bc09bc0f8d0cb04l-f1458419688r.jpg)

![4 KEY Avenue - Photo 2](http://lh.rdcpix.com/0a7f50104c856f999bc09bc0f8d0cb04l-f239573378r.jpg)

![4 KEY Avenue - Photo 3](http://lh.rdcpix.com/0a7f50104c856f999bc09bc0f8d0cb04l-f2364585765r.jpg)

![4 KEY Avenue - Photo 4](http://lh.rdcpix.com/0a7f50104c856f999bc09bc0f8d0cb04l-f3669988866r.jpg)

![4 KEY Avenue - Photo 5](http://lh.rdcpix.com/0a7f50104c856f999bc09bc0f8d0cb04l-f2146134604r.jpg)

![4 KEY Avenue - Photo 6](http://lh.rdcpix.com/0a7f50104c856f999bc09bc0f8d0cb04l-f2002596724r.jpg)

![4 KEY Avenue - Photo 7](http://lh.rdcpix.com/0a7f50104c856f999bc09bc0f8d0cb04l-f1193868119r.jpg)

![4 KEY Avenue - Photo 8](http://lh.rdcpix.com/0a7f50104c856f999bc09bc0f8d0cb04l-f204836961r.jpg)

![4 KEY Avenue - Photo 9](http://lh.rdcpix.com/0a7f50104c856f999bc09bc0f8d0cb04l-f2653900622r.jpg)

![4 KEY Avenue - Photo 10](http://lh.rdcpix.com/0a7f50104c856f999bc09bc0f8d0cb04l-f3109490308r.jpg)

![4 KEY Avenue - Photo 11](http://lh.rdcpix.com/0a7f50104c856f999bc09bc0f8d0cb04l-f1401507173r.jpg)

![4 KEY Avenue - Photo 12](http://lh.rdcpix.com/0a7f50104c856f999bc09bc0f8d0cb04l-f1809111039r.jpg)

![4 KEY Avenue - Photo 13](http://lh.rdcpix.com/0a7f50104c856f999bc09bc0f8d0cb04l-f3195772652r.jpg)

![4 KEY Avenue - Photo 14](http://lh.rdcpix.com/0a7f50104c856f999bc09bc0f8d0cb04l-f1805033012r.jpg)

---

**MLS#:** MDFR2089410 | **Updated:** 2026-09-21
**Source:** listhub

*Copyright © 2026 Bright MLS. All rights reserved. All information provided by the listing agent/broker is deemed reliable but is not guaranteed and should be independently verified.*

[View on PropertySimple](https://www.propertysimple.ai/listing/4-key-avenue-frederick-md-21701-r2089410)

---

## Structured Data

```json
{
  "@context": "https://schema.org",
  "@type": "RealEstateListing",
  "@id": "https://www.propertysimple.ai/listing/4-key-avenue-frederick-md-21701-r2089410#listing",
  "url": "https://www.propertysimple.ai/listing/4-key-avenue-frederick-md-21701-r2089410",
  "name": "4 KEY Avenue, Frederick, MD 21701",
  "description": "This charming bungalow is minutes from Downtown Frederick and major interstates. Great price for a single family home. Fantastic yard with enough space to add a garage. A little \"Sweat Equity\" will go a long way on this 3 bedroom, 1 bath home. Zoned Commercial/Residential.",
  "image": [
    "http://lh.rdcpix.com/0a7f50104c856f999bc09bc0f8d0cb04l-f1458419688r.jpg",
    "http://lh.rdcpix.com/0a7f50104c856f999bc09bc0f8d0cb04l-f239573378r.jpg",
    "http://lh.rdcpix.com/0a7f50104c856f999bc09bc0f8d0cb04l-f2364585765r.jpg",
    "http://lh.rdcpix.com/0a7f50104c856f999bc09bc0f8d0cb04l-f3669988866r.jpg",
    "http://lh.rdcpix.com/0a7f50104c856f999bc09bc0f8d0cb04l-f2146134604r.jpg",
    "http://lh.rdcpix.com/0a7f50104c856f999bc09bc0f8d0cb04l-f2002596724r.jpg",
    "http://lh.rdcpix.com/0a7f50104c856f999bc09bc0f8d0cb04l-f1193868119r.jpg",
    "http://lh.rdcpix.com/0a7f50104c856f999bc09bc0f8d0cb04l-f204836961r.jpg",
    "http://lh.rdcpix.com/0a7f50104c856f999bc09bc0f8d0cb04l-f2653900622r.jpg",
    "http://lh.rdcpix.com/0a7f50104c856f999bc09bc0f8d0cb04l-f3109490308r.jpg",
    "http://lh.rdcpix.com/0a7f50104c856f999bc09bc0f8d0cb04l-f1401507173r.jpg",
    "http://lh.rdcpix.com/0a7f50104c856f999bc09bc0f8d0cb04l-f1809111039r.jpg",
    "http://lh.rdcpix.com/0a7f50104c856f999bc09bc0f8d0cb04l-f3195772652r.jpg",
    "http://lh.rdcpix.com/0a7f50104c856f999bc09bc0f8d0cb04l-f1805033012r.jpg"
  ],
  "primaryImageOfPage": {
    "@type": "ImageObject",
    "url": "http://lh.rdcpix.com/0a7f50104c856f999bc09bc0f8d0cb04l-f1458419688r.jpg",
    "caption": "4 KEY Avenue - Frederick, MD"
  },
  "datePosted": "2026-09-17T00:00:00+00:00",
  "dateModified": "2026-09-21T18:35:28.343229+00:00",
  "mainEntity": {
    "@type": "Accommodation",
    "@id": "https://www.propertysimple.ai/listing/4-key-avenue-frederick-md-21701-r2089410#property",
    "name": "4 KEY Avenue, Frederick, MD 21701",
    "address": {
      "@type": "PostalAddress",
      "streetAddress": "4 KEY Avenue",
      "addressLocality": "Frederick",
      "addressRegion": "MD",
      "postalCode": "21701",
      "addressCountry": "US"
    },
    "geo": {
      "@type": "GeoCoordinates",
      "latitude": 39.43096,
      "longitude": -77.4066
    },
    "image": [
      "http://lh.rdcpix.com/0a7f50104c856f999bc09bc0f8d0cb04l-f1458419688r.jpg",
      "http://lh.rdcpix.com/0a7f50104c856f999bc09bc0f8d0cb04l-f239573378r.jpg",
      "http://lh.rdcpix.com/0a7f50104c856f999bc09bc0f8d0cb04l-f2364585765r.jpg",
      "http://lh.rdcpix.com/0a7f50104c856f999bc09bc0f8d0cb04l-f3669988866r.jpg",
      "http://lh.rdcpix.com/0a7f50104c856f999bc09bc0f8d0cb04l-f2146134604r.jpg",
      "http://lh.rdcpix.com/0a7f50104c856f999bc09bc0f8d0cb04l-f2002596724r.jpg",
      "http://lh.rdcpix.com/0a7f50104c856f999bc09bc0f8d0cb04l-f1193868119r.jpg",
      "http://lh.rdcpix.com/0a7f50104c856f999bc09bc0f8d0cb04l-f204836961r.jpg",
      "http://lh.rdcpix.com/0a7f50104c856f999bc09bc0f8d0cb04l-f2653900622r.jpg",
      "http://lh.rdcpix.com/0a7f50104c856f999bc09bc0f8d0cb04l-f3109490308r.jpg",
      "http://lh.rdcpix.com/0a7f50104c856f999bc09bc0f8d0cb04l-f1401507173r.jpg",
      "http://lh.rdcpix.com/0a7f50104c856f999bc09bc0f8d0cb04l-f1809111039r.jpg",
      "http://lh.rdcpix.com/0a7f50104c856f999bc09bc0f8d0cb04l-f3195772652r.jpg",
      "http://lh.rdcpix.com/0a7f50104c856f999bc09bc0f8d0cb04l-f1805033012r.jpg"
    ],
    "identifier": {
      "@type": "PropertyValue",
      "propertyID": "MLS",
      "value": "MDFR2089410"
    },
    "accommodationCategory": "Other",
    "numberOfBedrooms": 3,
    "numberOfBathroomsTotal": 1,
    "numberOfFullBathrooms": 1,
    "floorSize": {
      "@type": "QuantitativeValue",
      "value": 862,
      "unitCode": "FTK",
      "unitText": "square feet"
    },
    "yearBuilt": 1935,
    "amenityFeature": [
      {
        "@type": "LocationFeatureSpecification",
        "name": "Parking Features",
        "value": "Driveway"
      }
    ],
    "additionalProperty": [
      {
        "@type": "PropertyValue",
        "name": "Lot Size",
        "value": "0.19 acres"
      },
      {
        "@type": "PropertyValue",
        "name": "Stories",
        "value": 1
      },
      {
        "@type": "PropertyValue",
        "name": "Property Subtype",
        "value": "Other"
      }
    ]
  },
  "offers": {
    "@type": "Offer",
    "@id": "https://www.propertysimple.ai/listing/4-key-avenue-frederick-md-21701-r2089410#offer",
    "url": "https://www.propertysimple.ai/listing/4-key-avenue-frederick-md-21701-r2089410",
    "price": 249900,
    "priceCurrency": "USD",
    "businessFunction": "http://purl.org/goodrelations/v1#Sell",
    "availability": "https://schema.org/InStock",
    "seller": {
      "@id": "https://www.propertysimple.ai/listing/4-key-avenue-frederick-md-21701-r2089410#agent"
    }
  },
  "provider": {
    "@type": "Person",
    "@id": "https://www.propertysimple.ai/listing/4-key-avenue-frederick-md-21701-r2089410#agent",
    "name": "Timothy D O'Boyle",
    "telephone": "2404093151",
    "worksFor": {
      "@type": "Organization",
      "@id": "https://www.propertysimple.ai/listing/4-key-avenue-frederick-md-21701-r2089410#brokerage",
      "name": "Mackintosh Inc., REALTORS",
      "telephone": "(301) 662-0155"
    }
  }
}
```