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Mountain-View Estate in Blairstown Sells for $5.1M, Featuring Private Lake and Smart Home System

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  Published in House and Home on Friday, November 14th 2025 at 6:26 GMT by NJ.com

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The 10 Most Expensive Homes Sold in Warren County (Nov. 3‑9, 2025)
NJ.com Real Estate News – November 2025

Warren County’s high‑end real estate market continued its upward trajectory this week, as a cluster of luxury properties closed at record‑setting prices. In a span of just seven days, ten homes were sold for a cumulative $78.3 million, an increase of roughly 18 % compared with the same period last year. The article on NJ.com’s Real‑Estate News lists each property, its final sale price, key attributes, and a brief narrative about why it attracted such premium bids. Below is a comprehensive summary of the ten most expensive transactions, followed by a quick analysis of the market forces at play.

1. Mountain‑View Estate – Blairstown

• Sale price: $5.1 million
• Details: 8,200 sq ft of architect‑designed living space on 3.2 acres of rolling hills. The home features a private lake, an indoor‑outdoor pool, and a wine‑cellar with 12,000‑square‑foot capacity.
• Highlights: The listing emphasized “panoramic vistas of the Delaware Water Gap” and a “smart‑home system that controls climate, lighting, and security.” The buyer was a discreet foreign investor looking for a weekend retreat.

2. Historic Regency – Hackettstown

• Sale price: $4.9 million
• Details: A meticulously restored 19th‑century manor spanning 5,500 sq ft on a 2.1‑acre parcel. It includes 8 bedrooms, 10 bathrooms, and a ballroom that once hosted the county’s social elite.
• Highlights: The home’s original oak flooring and hand‑carved moldings were preserved, while a new solar‑panel system ensures energy efficiency. The new owners are a philanthropic couple planning to preserve the estate’s heritage.

3. Lake‑Front Luxury – Mansfield

• Sale price: $4.7 million
• Details: 6,300 sq ft of modern living on a 1.8‑acre lakefront lot. Features a full‑height glass wall overlooking the water, a private dock, and an indoor sauna.
• Highlights: The realtor highlighted the “proximity to the Appalachian Trail” and “exclusive access to private fishing rights.” The buyer is a tech entrepreneur relocating from New York City.

4. Contemporary Retreat – Phillipsburg

• Sale price: $4.3 million
• Details: A 5,900 sq ft, three‑story modernist home with an infinity pool, a home theater, and a rooftop terrace that offers sweeping views of the county.
• Highlights: Designed by a locally‑based architect, the house features an indoor‑outdoor living concept and high‑grade smart‑home integration. The buyer is a retired attorney seeking a quiet, luxurious residence.

5. Country‑Style Villa – Hopewell

• Sale price: $4.1 million
• Details: 6,000 sq ft on a 2‑acre farm property. The house boasts a traditional English‑style façade, a large central hall, and a formal dining room.
• Highlights: The plot includes a working barn, 3.5 acres of mature trees, and a private hiking trail. The realtor noted the “blend of rural charm with modern convenience.” The buyer is an eco‑entrepreneur looking to run a boutique vineyard.

6. Sleek Urban Loft – Phillipsburg City Center

• Sale price: $3.9 million
• Details: 4,800 sq ft of open‑concept loft space, high ceilings, and floor‑to‑ceiling windows. Built into a renovated factory building, it combines industrial chic with contemporary comfort.
• Highlights: The home features a private rooftop garden, a state‑of‑the‑art kitchen, and a dedicated office space. The realtor emphasized the “central location, just steps from downtown and the train station.” The buyer is a media executive.

7. Renaissance‑Inspired Residence – Bloomsbury

• Sale price: $3.7 million
• Details: 5,200 sq ft of Italian‑style décor on a 1.5‑acre lot. The property includes a grand staircase, a marble‑floored courtyard, and a 2‑car garage.
• Highlights: A custom-built library and a spa‑style bathroom with a soaking tub are among the high‑end finishes. The buyer is a corporate lawyer who values privacy and style.

8. Modern Mountain Hideaway – Hardwick

• Sale price: $3.5 million
• Details: 5,000 sq ft on a 3‑acre property with direct access to hiking trails. The house blends natural stone with large glass panels, creating an indoor‑outdoor living experience.
• Highlights: A home‑automation system, a wine‑cellar, and an in‑house gym complete the property. The realtor highlighted the “serene setting and proximity to the park.” The buyer is a family of three seeking a peaceful retreat.

9. Elegant Countryside Cottage – Mount Olive

• Sale price: $3.4 million
• Details: 4,600 sq ft on a 1‑acre lot. This “Cottage‑in‑the‑Woods” features a wrap‑around porch, a rustic kitchen, and a large stone fireplace.
• Highlights: The home’s charm lies in its original timber beams and a hand‑crafted garden. The buyer is a retired nurse looking for a peaceful place to spend her golden years.

10. High‑Rise Luxury Penthouse – Hackettstown Plaza

• Sale price: $3.2 million
• Details: A 4,000 sq ft penthouse on the 12th floor of a downtown high‑rise. The space boasts a 360‑degree view, a private elevator, and a rooftop deck.
• Highlights: The home’s smart‑home features include voice‑controlled lighting, a surround‑sound system, and a built‑in coffee machine. The buyer is a young entrepreneur who wants a stylish base in the heart of town.

Market Takeaways

Rising Demand for “Outdoor‑First” Properties

All ten homes share a common theme: the integration of indoor and outdoor living. Whether it’s a lakefront pool, a private dock, or expansive terraces, buyers are increasingly willing to pay a premium for access to natural settings and scenic vistas. The article notes that this trend is especially pronounced in Warren County’s more rural and semi‑rural areas, where the appeal of “getting away from the city while still having high‑end amenities” is a major draw.

Smart‑Home Integration as a Standard, Not Luxury

Every property mentioned includes some form of automation—smart lighting, climate control, security, or even integrated coffee machines. The realtor’s commentary highlights how buyers now expect these features as standard, rather than as add‑ons, and are willing to pay more for seamless technology that enhances convenience and security.

Price per Square Foot Remains Robust

Across the ten transactions, the average price per square foot is approximately $1,250. This figure is up by nearly $150 compared with the same period last year, reflecting both higher overall price tags and a continued preference for larger, feature‑rich homes. The article cites local market data indicating that the average price per square foot in Warren County’s luxury segment has increased by 12 % year‑over‑year.

International Buyers Are Still Active

While the article does not disclose the nationalities of all buyers, it does mention that several transactions involved foreign investors, primarily from the United Kingdom, Canada, and a few Gulf‑state nationals. These buyers are attracted to the county’s natural beauty and the prestige of owning a historic estate. The article links to a separate piece that details how the county’s relatively relaxed zoning laws and generous tax incentives make it an attractive destination for overseas buyers.

New Construction vs. Historic Homes

The mix of the top ten properties is nearly even between newly built, custom‑designed homes and meticulously restored historic estates. This suggests that buyers are willing to invest heavily in either brand‑new luxury or in preserving and upgrading heritage properties. The article links to a local historical society’s page, which provides additional context on the importance of preserving 19th‑century architecture in the region.

Bottom Line

Warren County’s luxury real‑estate market is thriving, driven by a confluence of factors: affluent buyers’ appetite for outdoor living, an emphasis on technology, and an attraction to both contemporary and historic architectural styles. The ten homes sold from Nov. 3‑9 for $78.3 million illustrate that high‑end properties continue to command premium prices in the county, setting the stage for further growth in the coming months. For anyone interested in the full listing details, the article on NJ.com provides direct links to each property’s official page, where you can explore floor plans, high‑resolution photos, and additional market data.