# 410 HASSENPLUG Road, Millmont, PA 17845 > **TL;DR:** 4bd/4ba single family, $999,999 ($172/sqft), built 1969, 5,800 sqft. Est. $5,349/mo. Listed 11 days. ## Property at a Glance | Attribute | Value | |-----------|-------| | Price | $999,999 | | Price/sqft | $172 | | Bedrooms | 4 | | Bathrooms | 4 full | | Square Feet | 5,800 | | Year Built | 1969 | | Lot Size | 399,445 sqft (9.17 acres) | | Stories | 2 | | Property Type | Single Family (Other) | | Status | Active | | Days on Market | 11 | ## Estimated Monthly Costs | Category | Amount | |----------|--------| | Principal & Interest (20% down, 30-year at 6.5%) | $5,057 | | Estimated Insurance | $292 | | **Total** | **$5,349** | ## Property Highlights - Built in 1969 - 9.17 acre lot - 2 stories - 3 parking spaces ## Description ### Agent Description Exceptionally rare opportunity to acquire a Cold War-era underground communications facility, originally constructed between 1967 and 1971 as part of AT&T's Long Lines network and engineered for durability, redundancy, and long-term self-sufficiency. The property features an approximately 4,813-square-foot below-grade reinforced concrete bunker beneath a 987-square-foot, four-car concrete block garage. The bunker is configured with multiple secured rooms, hardened corridors, mechanical and utility areas, a generator room, decontamination room, full kitchen, and four bathrooms. An elevator connects the above-grade garage to the underground facility, while copper screening within several interior partitions provides additional electromagnetic attenuation. The facility underwent extensive renovations in the early 2000s to support its potential use as a secure data and communications center. These improvements included updates to the electrical distribution, mechanical systems, and interior spaces for sensitive equipment and long-duration operations. Power infrastructure includes commercial electric service with automatic transfer capability and a 150 kVA diesel generator supported by approximately 2,500 gallons of on-site fuel storage. Heating and cooling are provided by multiple geothermal heat pumps served by four reported geothermal wells approximately 300 feet deep. Water infrastructure includes a separate potable well reported to be approximately 125 feet deep, a 1,500-gallon fresh-water storage tank, water filtration, and an on-site septic system. The facility also incorporates multi-stage air filtration designed to support extended below-grade occupancy. Situated on approximately 9.17 private acres, the property features a high gated perimeter fence, controlled entrance, substantial setbacks, and a discreet, low-profile footprint. The property is located in Flood Zone X and is currently zoned Agricultural Preservation. The existing commercial use has been identified in the appraisal as a pre-existing grandfathered use. Potential applications include a secure private compound, data center or server facility, continuity-of-operations site, research facility, specialized storage, or other approved uses. Due to the unique and sensitive nature of the property, certain information is available only to qualified prospective purchasers. Showings by appointment only. Proof of funds required. All proposed uses, system capacities, operating conditions, zoning, and measurements should be independently verified. ## Location - **Address:** 410 HASSENPLUG Road, Millmont, PA 17845 - **County:** UNION - **Neighborhood:** NONE AVAILABLE - **Coordinates:** 40.88833, -77.21068 - **Google Maps:** https://www.google.com/maps?q=40.88833,-77.21068 ## Listing Agent - **Name:** Blain Berrier · **License:** RS362278 - **Brokerage:** RSR Realtors - **Phone:** 7176456418 - **Broker Phone:** (717) 763-1212 - **Listing URL:** [View original listing](https://www.realtor.com/realestateandhomes-detail/410-Hassenplug-Rd_Millmont_PA_17845_M92260-22941?f=listhub&s=TRENDPA&m=PAUN2000880&c=propsimple) ## Photos ![410 HASSENPLUG Road - Photo 1](http://lh.rdcpix.com/854e93dd6bdd3faecd2f51939b700fbbl-f2029318507r.jpg) ![410 HASSENPLUG Road - Photo 2](http://lh.rdcpix.com/854e93dd6bdd3faecd2f51939b700fbbl-f50819652r.jpg) ![410 HASSENPLUG Road - Photo 3](http://lh.rdcpix.com/854e93dd6bdd3faecd2f51939b700fbbl-f3723205550r.jpg) ![410 HASSENPLUG Road - Photo 4](http://lh.rdcpix.com/854e93dd6bdd3faecd2f51939b700fbbl-f2182937473r.jpg) ![410 HASSENPLUG Road - Photo 5](http://lh.rdcpix.com/854e93dd6bdd3faecd2f51939b700fbbl-f1070852517r.jpg) ![410 HASSENPLUG Road - Photo 6](http://lh.rdcpix.com/854e93dd6bdd3faecd2f51939b700fbbl-f3310007692r.jpg) ![410 HASSENPLUG Road - Photo 7](http://lh.rdcpix.com/854e93dd6bdd3faecd2f51939b700fbbl-f3742041436r.jpg) ![410 HASSENPLUG Road - Photo 8](http://lh.rdcpix.com/854e93dd6bdd3faecd2f51939b700fbbl-f585007981r.jpg) ![410 HASSENPLUG Road - Photo 9](http://lh.rdcpix.com/854e93dd6bdd3faecd2f51939b700fbbl-f3306324162r.jpg) ![410 HASSENPLUG Road - Photo 10](http://lh.rdcpix.com/854e93dd6bdd3faecd2f51939b700fbbl-f1786799705r.jpg) ![410 HASSENPLUG Road - Photo 11](http://lh.rdcpix.com/854e93dd6bdd3faecd2f51939b700fbbl-f1205839961r.jpg) ![410 HASSENPLUG Road - Photo 12](http://lh.rdcpix.com/854e93dd6bdd3faecd2f51939b700fbbl-f3540799312r.jpg) ![410 HASSENPLUG Road - Photo 13](http://lh.rdcpix.com/854e93dd6bdd3faecd2f51939b700fbbl-f491682660r.jpg) ![410 HASSENPLUG Road - Photo 14](http://lh.rdcpix.com/854e93dd6bdd3faecd2f51939b700fbbl-f3215515016r.jpg) ![410 HASSENPLUG Road - Photo 15](http://lh.rdcpix.com/854e93dd6bdd3faecd2f51939b700fbbl-f3192271634r.jpg) ![410 HASSENPLUG Road - Photo 16](http://lh.rdcpix.com/854e93dd6bdd3faecd2f51939b700fbbl-f3083576387r.jpg) ![410 HASSENPLUG Road - Photo 17](http://lh.rdcpix.com/854e93dd6bdd3faecd2f51939b700fbbl-f840145613r.jpg) ![410 HASSENPLUG Road - Photo 18](http://lh.rdcpix.com/854e93dd6bdd3faecd2f51939b700fbbl-f113496952r.jpg) ![410 HASSENPLUG Road - Photo 19](http://lh.rdcpix.com/854e93dd6bdd3faecd2f51939b700fbbl-f4075008451r.jpg) ![410 HASSENPLUG Road - Photo 20](http://lh.rdcpix.com/854e93dd6bdd3faecd2f51939b700fbbl-f1808356776r.jpg) ![410 HASSENPLUG Road - Photo 21](http://lh.rdcpix.com/854e93dd6bdd3faecd2f51939b700fbbl-f503308390r.jpg) ![410 HASSENPLUG Road - Photo 22](http://lh.rdcpix.com/854e93dd6bdd3faecd2f51939b700fbbl-f2338300446r.jpg) ![410 HASSENPLUG Road - Photo 23](http://lh.rdcpix.com/854e93dd6bdd3faecd2f51939b700fbbl-f891176102r.jpg) ![410 HASSENPLUG Road - Photo 24](http://lh.rdcpix.com/854e93dd6bdd3faecd2f51939b700fbbl-f25656302r.jpg) ![410 HASSENPLUG Road - Photo 25](http://lh.rdcpix.com/854e93dd6bdd3faecd2f51939b700fbbl-f828380577r.jpg) ![410 HASSENPLUG Road - Photo 26](http://lh.rdcpix.com/854e93dd6bdd3faecd2f51939b700fbbl-f2844360714r.jpg) ![410 HASSENPLUG Road - Photo 27](http://lh.rdcpix.com/854e93dd6bdd3faecd2f51939b700fbbl-f3756132809r.jpg) ![410 HASSENPLUG Road - Photo 28](http://lh.rdcpix.com/854e93dd6bdd3faecd2f51939b700fbbl-f545535306r.jpg) ![410 HASSENPLUG Road - Photo 29](http://lh.rdcpix.com/854e93dd6bdd3faecd2f51939b700fbbl-f3234201725r.jpg) ![410 HASSENPLUG Road - Photo 30](http://lh.rdcpix.com/854e93dd6bdd3faecd2f51939b700fbbl-f778738285r.jpg) ![410 HASSENPLUG Road - Photo 31](http://lh.rdcpix.com/854e93dd6bdd3faecd2f51939b700fbbl-f989680800r.jpg) ![410 HASSENPLUG Road - Photo 32](http://lh.rdcpix.com/854e93dd6bdd3faecd2f51939b700fbbl-f2709236r.jpg) ![410 HASSENPLUG Road - Photo 33](http://lh.rdcpix.com/854e93dd6bdd3faecd2f51939b700fbbl-f523960578r.jpg) ![410 HASSENPLUG Road - Photo 34](http://lh.rdcpix.com/854e93dd6bdd3faecd2f51939b700fbbl-f4159267788r.jpg) ![410 HASSENPLUG Road - Photo 35](http://lh.rdcpix.com/854e93dd6bdd3faecd2f51939b700fbbl-f1067017673r.jpg) ![410 HASSENPLUG Road - Photo 36](http://lh.rdcpix.com/854e93dd6bdd3faecd2f51939b700fbbl-f1179026053r.jpg) ![410 HASSENPLUG Road - Photo 37](http://lh.rdcpix.com/854e93dd6bdd3faecd2f51939b700fbbl-f1550741313r.jpg) --- **MLS#:** PAUN2000880 | **Updated:** 2026-09-07 **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/410-hassenplug-road-millmont-pa-17845-n2000880) --- ## Structured Data ```json { "@context": "https://schema.org", "@type": "RealEstateListing", "@id": "https://www.propertysimple.ai/listing/410-hassenplug-road-millmont-pa-17845-n2000880#listing", "url": "https://www.propertysimple.ai/listing/410-hassenplug-road-millmont-pa-17845-n2000880", "name": "410 HASSENPLUG Road, Millmont, PA 17845", "description": "Exceptionally rare opportunity to acquire a Cold War-era underground communications facility, originally constructed between 1967 and 1971 as part of AT&T's Long Lines network and engineered for durability, redundancy, and long-term self-sufficiency. The property features an approximately 4,813-square-foot below-grade reinforced concrete bunker beneath a 987-square-foot, four-car concrete block garage. The bunker is configured with multiple secured rooms, hardened corridors, mechanical and utility areas, a generator room, decontamination room, full kitchen, and four bathrooms. An elevator connects the above-grade garage to the underground facility, while copper screening within several interior partitions provides additional electromagnetic attenuation. The facility underwent extensive renovations in the early 2000s to support its potential use as a secure data and communications center. These improvements included updates to the electrical distribution, mechanical systems, and interior spaces for sensitive equipment and long-duration operations. Power infrastructure includes commercial electric service with automatic transfer capability and a 150 kVA diesel generator supported by approximately 2,500 gallons of on-site fuel storage. Heating and cooling are provided by multiple geothermal heat pumps served by four reported geothermal wells approximately 300 feet deep. Water infrastructure includes a separate potable well reported to be approximately 125 feet deep, a 1,500-gallon fresh-water storage tank, water filtration, and an on-site septic system. The facility also incorporates multi-stage air filtration designed to support extended below-grade occupancy. Situated on approximately 9.17 private acres, the property features a high gated perimeter fence, controlled entrance, substantial setbacks, and a discreet, low-profile footprint. The property is located in Flood Zone X and is currently zoned Agricultural Preservation. The existing commercial use has been identified in the appraisal as a pre-existing grandfathered use. Potential applications include a secure private compound, data center or server facility, continuity-of-operations site, research facility, specialized storage, or other approved uses. Due to the unique and sensitive nature of the property, certain information is available only to qualified prospective purchasers. Showings by appointment only. Proof of funds required. All proposed uses, system capacities, operating conditions, zoning, and measurements should be independently verified.", "image": [ "http://lh.rdcpix.com/854e93dd6bdd3faecd2f51939b700fbbl-f2029318507r.jpg", "http://lh.rdcpix.com/854e93dd6bdd3faecd2f51939b700fbbl-f50819652r.jpg", "http://lh.rdcpix.com/854e93dd6bdd3faecd2f51939b700fbbl-f3723205550r.jpg", "http://lh.rdcpix.com/854e93dd6bdd3faecd2f51939b700fbbl-f2182937473r.jpg", "http://lh.rdcpix.com/854e93dd6bdd3faecd2f51939b700fbbl-f1070852517r.jpg", "http://lh.rdcpix.com/854e93dd6bdd3faecd2f51939b700fbbl-f3310007692r.jpg", "http://lh.rdcpix.com/854e93dd6bdd3faecd2f51939b700fbbl-f3742041436r.jpg", "http://lh.rdcpix.com/854e93dd6bdd3faecd2f51939b700fbbl-f585007981r.jpg", "http://lh.rdcpix.com/854e93dd6bdd3faecd2f51939b700fbbl-f3306324162r.jpg", "http://lh.rdcpix.com/854e93dd6bdd3faecd2f51939b700fbbl-f1786799705r.jpg", "http://lh.rdcpix.com/854e93dd6bdd3faecd2f51939b700fbbl-f1205839961r.jpg", "http://lh.rdcpix.com/854e93dd6bdd3faecd2f51939b700fbbl-f3540799312r.jpg", "http://lh.rdcpix.com/854e93dd6bdd3faecd2f51939b700fbbl-f491682660r.jpg", "http://lh.rdcpix.com/854e93dd6bdd3faecd2f51939b700fbbl-f3215515016r.jpg", "http://lh.rdcpix.com/854e93dd6bdd3faecd2f51939b700fbbl-f3192271634r.jpg", "http://lh.rdcpix.com/854e93dd6bdd3faecd2f51939b700fbbl-f3083576387r.jpg", "http://lh.rdcpix.com/854e93dd6bdd3faecd2f51939b700fbbl-f840145613r.jpg", "http://lh.rdcpix.com/854e93dd6bdd3faecd2f51939b700fbbl-f113496952r.jpg", "http://lh.rdcpix.com/854e93dd6bdd3faecd2f51939b700fbbl-f4075008451r.jpg", "http://lh.rdcpix.com/854e93dd6bdd3faecd2f51939b700fbbl-f1808356776r.jpg", "http://lh.rdcpix.com/854e93dd6bdd3faecd2f51939b700fbbl-f503308390r.jpg", "http://lh.rdcpix.com/854e93dd6bdd3faecd2f51939b700fbbl-f2338300446r.jpg", "http://lh.rdcpix.com/854e93dd6bdd3faecd2f51939b700fbbl-f891176102r.jpg", "http://lh.rdcpix.com/854e93dd6bdd3faecd2f51939b700fbbl-f25656302r.jpg", "http://lh.rdcpix.com/854e93dd6bdd3faecd2f51939b700fbbl-f828380577r.jpg", "http://lh.rdcpix.com/854e93dd6bdd3faecd2f51939b700fbbl-f2844360714r.jpg", "http://lh.rdcpix.com/854e93dd6bdd3faecd2f51939b700fbbl-f3756132809r.jpg", "http://lh.rdcpix.com/854e93dd6bdd3faecd2f51939b700fbbl-f545535306r.jpg", "http://lh.rdcpix.com/854e93dd6bdd3faecd2f51939b700fbbl-f3234201725r.jpg", "http://lh.rdcpix.com/854e93dd6bdd3faecd2f51939b700fbbl-f778738285r.jpg", "http://lh.rdcpix.com/854e93dd6bdd3faecd2f51939b700fbbl-f989680800r.jpg", "http://lh.rdcpix.com/854e93dd6bdd3faecd2f51939b700fbbl-f2709236r.jpg", "http://lh.rdcpix.com/854e93dd6bdd3faecd2f51939b700fbbl-f523960578r.jpg", "http://lh.rdcpix.com/854e93dd6bdd3faecd2f51939b700fbbl-f4159267788r.jpg", "http://lh.rdcpix.com/854e93dd6bdd3faecd2f51939b700fbbl-f1067017673r.jpg", "http://lh.rdcpix.com/854e93dd6bdd3faecd2f51939b700fbbl-f1179026053r.jpg", "http://lh.rdcpix.com/854e93dd6bdd3faecd2f51939b700fbbl-f1550741313r.jpg" ], "primaryImageOfPage": { "@type": "ImageObject", "url": "http://lh.rdcpix.com/854e93dd6bdd3faecd2f51939b700fbbl-f2029318507r.jpg", "caption": "410 HASSENPLUG Road - Millmont, PA" }, "datePosted": "2026-09-07T00:00:00+00:00", "dateModified": "2026-09-07T16:45:04.265519+00:00", "mainEntity": { "@type": "Accommodation", "@id": "https://www.propertysimple.ai/listing/410-hassenplug-road-millmont-pa-17845-n2000880#property", "name": "410 HASSENPLUG Road, Millmont, PA 17845", "address": { "@type": "PostalAddress", "streetAddress": "410 HASSENPLUG Road", "addressLocality": "Millmont", "addressRegion": "PA", "postalCode": "17845", "addressCountry": "US" }, "geo": { "@type": "GeoCoordinates", "latitude": 40.88833, "longitude": -77.21068 }, "image": [ "http://lh.rdcpix.com/854e93dd6bdd3faecd2f51939b700fbbl-f2029318507r.jpg", "http://lh.rdcpix.com/854e93dd6bdd3faecd2f51939b700fbbl-f50819652r.jpg", "http://lh.rdcpix.com/854e93dd6bdd3faecd2f51939b700fbbl-f3723205550r.jpg", "http://lh.rdcpix.com/854e93dd6bdd3faecd2f51939b700fbbl-f2182937473r.jpg", "http://lh.rdcpix.com/854e93dd6bdd3faecd2f51939b700fbbl-f1070852517r.jpg", "http://lh.rdcpix.com/854e93dd6bdd3faecd2f51939b700fbbl-f3310007692r.jpg", "http://lh.rdcpix.com/854e93dd6bdd3faecd2f51939b700fbbl-f3742041436r.jpg", "http://lh.rdcpix.com/854e93dd6bdd3faecd2f51939b700fbbl-f585007981r.jpg", "http://lh.rdcpix.com/854e93dd6bdd3faecd2f51939b700fbbl-f3306324162r.jpg", "http://lh.rdcpix.com/854e93dd6bdd3faecd2f51939b700fbbl-f1786799705r.jpg", "http://lh.rdcpix.com/854e93dd6bdd3faecd2f51939b700fbbl-f1205839961r.jpg", "http://lh.rdcpix.com/854e93dd6bdd3faecd2f51939b700fbbl-f3540799312r.jpg", "http://lh.rdcpix.com/854e93dd6bdd3faecd2f51939b700fbbl-f491682660r.jpg", "http://lh.rdcpix.com/854e93dd6bdd3faecd2f51939b700fbbl-f3215515016r.jpg", "http://lh.rdcpix.com/854e93dd6bdd3faecd2f51939b700fbbl-f3192271634r.jpg", "http://lh.rdcpix.com/854e93dd6bdd3faecd2f51939b700fbbl-f3083576387r.jpg", "http://lh.rdcpix.com/854e93dd6bdd3faecd2f51939b700fbbl-f840145613r.jpg", "http://lh.rdcpix.com/854e93dd6bdd3faecd2f51939b700fbbl-f113496952r.jpg", "http://lh.rdcpix.com/854e93dd6bdd3faecd2f51939b700fbbl-f4075008451r.jpg", "http://lh.rdcpix.com/854e93dd6bdd3faecd2f51939b700fbbl-f1808356776r.jpg", "http://lh.rdcpix.com/854e93dd6bdd3faecd2f51939b700fbbl-f503308390r.jpg", "http://lh.rdcpix.com/854e93dd6bdd3faecd2f51939b700fbbl-f2338300446r.jpg", "http://lh.rdcpix.com/854e93dd6bdd3faecd2f51939b700fbbl-f891176102r.jpg", "http://lh.rdcpix.com/854e93dd6bdd3faecd2f51939b700fbbl-f25656302r.jpg", "http://lh.rdcpix.com/854e93dd6bdd3faecd2f51939b700fbbl-f828380577r.jpg", "http://lh.rdcpix.com/854e93dd6bdd3faecd2f51939b700fbbl-f2844360714r.jpg", "http://lh.rdcpix.com/854e93dd6bdd3faecd2f51939b700fbbl-f3756132809r.jpg", "http://lh.rdcpix.com/854e93dd6bdd3faecd2f51939b700fbbl-f545535306r.jpg", "http://lh.rdcpix.com/854e93dd6bdd3faecd2f51939b700fbbl-f3234201725r.jpg", "http://lh.rdcpix.com/854e93dd6bdd3faecd2f51939b700fbbl-f778738285r.jpg", "http://lh.rdcpix.com/854e93dd6bdd3faecd2f51939b700fbbl-f989680800r.jpg", "http://lh.rdcpix.com/854e93dd6bdd3faecd2f51939b700fbbl-f2709236r.jpg", "http://lh.rdcpix.com/854e93dd6bdd3faecd2f51939b700fbbl-f523960578r.jpg", "http://lh.rdcpix.com/854e93dd6bdd3faecd2f51939b700fbbl-f4159267788r.jpg", "http://lh.rdcpix.com/854e93dd6bdd3faecd2f51939b700fbbl-f1067017673r.jpg", "http://lh.rdcpix.com/854e93dd6bdd3faecd2f51939b700fbbl-f1179026053r.jpg", "http://lh.rdcpix.com/854e93dd6bdd3faecd2f51939b700fbbl-f1550741313r.jpg" ], "identifier": { "@type": "PropertyValue", "propertyID": "MLS", "value": "PAUN2000880" }, "accommodationCategory": "Other", "numberOfBedrooms": 4, "numberOfBathroomsTotal": 4, "numberOfFullBathrooms": 4, "floorSize": { "@type": "QuantitativeValue", "value": 5800, "unitCode": "FTK", "unitText": "square feet" }, "yearBuilt": 1969, "amenityFeature": [ { "@type": "LocationFeatureSpecification", "name": "Heating", "value": "Heat Pump (Heating)" }, { "@type": "LocationFeatureSpecification", "name": "Cooling", "value": "Geothermal" }, { "@type": "LocationFeatureSpecification", "name": "Construction Materials", "value": "Concrete" }, { "@type": "LocationFeatureSpecification", "name": "Parking Features", "value": "Garage - Attached, Parking Lot" } ], "additionalProperty": [ { "@type": "PropertyValue", "name": "Lot Size", "value": "9.17 acres" }, { "@type": "PropertyValue", "name": "Stories", "value": 2 }, { "@type": "PropertyValue", "name": "Parking Spaces", "value": 3 }, { "@type": "PropertyValue", "name": "Property Subtype", "value": "Other" } ] }, "offers": { "@type": "Offer", "@id": "https://www.propertysimple.ai/listing/410-hassenplug-road-millmont-pa-17845-n2000880#offer", "url": "https://www.propertysimple.ai/listing/410-hassenplug-road-millmont-pa-17845-n2000880", "price": 999999, "priceCurrency": "USD", "businessFunction": "http://purl.org/goodrelations/v1#Sell", "availability": "https://schema.org/InStock", "seller": { "@id": "https://www.propertysimple.ai/listing/410-hassenplug-road-millmont-pa-17845-n2000880#agent" } }, "provider": { "@type": "Person", "@id": "https://www.propertysimple.ai/listing/410-hassenplug-road-millmont-pa-17845-n2000880#agent", "name": "Blain Berrier", "telephone": "7176456418", "worksFor": { "@type": "Organization", "@id": "https://www.propertysimple.ai/listing/410-hassenplug-road-millmont-pa-17845-n2000880#brokerage", "name": "RSR Realtors", "telephone": "(717) 763-1212" } } } ```