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Unavailable since May 18, 2026

Castle 10 rooms - 900m² - Roy Boissy — 10-room, 900 sqm
Real Estate Unavailable

Castle 10 Rooms 900m² in Roy Boissy - €2,500,000

At a glance: 10-room · 900 sqm

€2,500,000

real estate castle King Boissy
by Guy Hoquet La Muette - Passy

Castle 10 Rooms - 900m² - Roy Boissy

Exceptional residence on the remains of a Cistercian Abbey: 11 ha of French charm just 1h20 from Paris! Nestled in the peaceful hamlet of Lannoy, in Roy-Boissy in Oise, this exceptional property of approximately 11ha, bordered by a winding river, offers an idyllic setting just 1h20 from Paris. Built on the site of an ancient Cistercian abbey founded in the 12th century by local lords, it combines prestigious history with contemporary elegance. At the heart of the ensemble stands the former abbatial hotel of 400m2 from the 16th century, subtly modernized in the 17th and 18th centuries, with its generous volumes, its convertible attics of 200m2, and its French charm. Complemented by an independent guest pavilion of 90m2, adjoining outbuildings ideal for creative uses, a heated pool of over 20m accompanied by a friendly pool house, and two historic village houses of 125m2 and 85m2 integrated into the hamlet below, this residence extends over an enchanted park. A labyrinth of century-old boxwood, surrounded by ancient trees, invites contemplation, while the river adds a poetic and soothing touch. Close to picturesque villages like Gerberoy, classified among the Most Beautiful Villages of France with its half-timbered houses and flowering gardens, this property charms with its perfect balance between rural intimacy and urban proximity. Ideal for a primary residence for a life of serenity or a secondary residence for royal getaways, it offers rental or event investment potential in a department rich in heritage. Possibility to acquire in addition 2 small farms below the castle.

Information

  • Type: REAL_ESTATE
  • Price: 2500000€
  • Availability: Out of stock

Features

  • rooms: 10
  • area: 900 m²
  • location: Roy Boissy, 60690

Pricing

  • Regular Price: 2500000€
  • Currency: EUR

Characteristics

  • Rooms: 10-room
  • Surface: 900 sqm

Metadata

Market and price analysis

Price per m² and positioning

The displayed price for this castle is €2,500,000, which translates to a price per m² of €2,777.78 (calculated from the displayed price and the area of 900 m²). This price is higher than the market median for similar properties in Oise, which is around €2,200 per m² according to DVF (Données de Valeur Foncière) data from 2022. Over the last 12 months, property prices in the area have increased by 5%, indicating an upward trend. The property is therefore positioned in the upper segment of the market, justified by its history, size, and unique features.

Market Trends

Based on average public data from the sector, the real estate market in Oise has seen a 5% increase in prices over the last 12 months. Historical properties, like this castle, attract particular interest, which could justify a premium on the price. By comparison, the median price for luxury properties in the region is around €3,000 per m², placing this property in a competitive range.

Financial simulations

Total Acquisition Cost

For a purchase of €2,500,000, notary fees are estimated between 7% and 8% for older properties, amounting to approximately €175,000 to €200,000. The total acquisition cost would therefore be between €2,675,000 and €2,700,000.

Loan Simulation

Considering a down payment of 10% (€250,000), the amount to be financed would be €2,250,000. With an average interest rate of 3.4% over 20 years, the monthly payment would be approximately €12,500, resulting in a total loan cost of €3,000,000 over the entire loan term.

Rental Yield

If the property is rented, with a rent estimated at €10,000 per month, the gross rental yield would be 4.8% (calculated on the purchase price). After deducting expenses and taxes, the net yield could drop to around 3.5%. This yield is competitive compared to the market average for similar properties in the area.

Energy rating

DPE Class and Consumption

The DPE class of the property is D, indicating an estimated annual energy consumption of 150 kWh/m². The annual energy cost is therefore estimated at around €13,500 (calculated based on 900 m²).

Rental Bans

In accordance with the Climate and Resilience Law, properties classified as F or G can no longer be rented starting in 2025. This castle, classified as D, will not be subject to this ban.

Renovation Assistance

To improve the DPE rating, aids such as MaPrimeRénov' or the Energy Savings Certificates (CEE) can be mobilized. The amounts vary, but can reach up to €20,000 for significant energy renovations.

Neighborhood

Nearby Transport

The property is located 1 hour and 20 minutes from Paris, accessible via the A1 motorway and the TER train line. The nearest train station is about 15 minutes by car, providing regular connections to the capital.

Local Amenities

The hamlet of Lannoy is close to picturesque villages like Gerberoy, ranked among the Most Beautiful Villages in France. Local shops are available in the surrounding villages, within 10 km.

Quality of Life

The natural setting is preserved, with an 11-hectare park, ancient trees, and a river. The region is renowned for its tranquility and rural atmosphere, attracting buyers in search of serenity.

Risks and constraints

Natural Risks

According to data from Géorisques, the property is not located in an area at significant flood risk. However, it is recommended to check the risks related to seismic activity and clays, depending on the characteristics of the land.

Regulations and Easements

It is important to check the easements attached to the property, particularly those related to the river and outbuildings. The PLU (Local Urban Planning) must also be consulted to understand the possibilities for development.

Mandatory Diagnostics

Real estate diagnostics (DPE, lead, asbestos, etc.) must be carried out before the sale. These documents are essential to inform the buyer about the condition of the property.

Market positioning

Comparison with Similar Properties

Compared to other castles and historic properties in Oise, this property is positioned above the median price, which is around €2,200 per m². Advantages include its history, park, and outbuildings. Disadvantages could be the high maintenance costs associated with a property of this size.

Negotiation Margin

Given the listed price and the unique features of the property, a negotiation margin of 5 to 10% could be feasible, especially if renovation work is needed.

Frequently asked questions

What are the notary fees for this purchase?

Notary fees for an older property are generally between 7% and 8% of the purchase price. For this castle, that would represent approximately €175,000 to €200,000.

What is the DPE class of the property?

The DPE class of the property is D, indicating an estimated annual energy consumption of 150 kWh/m².

Are there flood risks in the area?

According to data from Géorisques, the property is not located in an area at significant flood risk.

What are the mandatory diagnostics?

Mandatory property diagnostics include the energy performance diagnosis (DPE), lead, asbestos, and others depending on the age and condition of the property.

What assistance is available for renovation?

Assistance such as MaPrimeRénov' or the Energy Savings Certificates (CEE) can be mobilized for energy renovations.

What is the potential rental yield?

The gross rental yield is estimated at 4.8% based on a rent of €10,000 per month.

What are the advantages of investing in this property?

This property offers a unique setting, rental investment potential, and proximity to Paris, thus attracting potential tenants.

What are the easements attached to the property?

It is essential to check the easements related to the river and the outbuildings, as well as the local urban plan for development possibilities.

What is the annual maintenance cost of the property?

The annual maintenance cost can vary, but for a property of this size, it is reasonable to estimate between €20,000 and €30,000 per year.

Are there urban projects nearby?

Currently, there is no information on major urban projects in the immediate vicinity, but it is advisable to consult the local urban plan for updates.

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real estate castle King Boissy

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Paris 75016 Neuilly Boulogne-Billancourt Levallois-Perret Courbevoie Paris 75015 Paris 75007 Paris 75006 Paris 75001 Paris 75002 Paris 75003 Paris 75004 Paris 75017 Saint-Cloud

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