What are MFC and BC: office classes A, B, C and what is the difference

When choosing an office, it is easy to get confused by the terminology: MFC, BC, classes A, B, C, Prime. Behind these letters lie real differences in building quality, engineering, location, and price, which directly affect the comfort of work and the cost of rent. In this article, we explain in simple terms: what MFC and BC are, how they differ, how offices are classified into classes A, B, and C, and what to look for when making a choice.

What is a BC (Business Center)

A BC, or business center, is a building (or building complex) designed primarily to accommodate offices. The main function of a business center is singular: to provide companies with high-quality office space and the necessary infrastructure.

A typical business center includes: office blocks of various sizes, an entrance group with a reception, elevator halls, parking, engineering systems (ventilation, air conditioning, power supply), and a security and access control system. The building is managed by a professional management company.

Business centers vary by class (A, B, C) depending on the building's quality, location, engineering equipment, and service level. More details on this classification are below.

What is an MFC (Multifunctional Complex)

An MFC, or multifunctional complex, is a building or group of buildings combining several functions at once. Unlike a business center, where the office function dominates, an MFC combines different types of real estate under one roof.

Typical composition of an MFC:

• Office floors (the business component)
• Retail galleries, shops, restaurants
• Apartments or a hotel
• Sometimes — fitness, SPA, entertainment zones, observation decks

A classic example of an MFC is the Moscow City towers. For example, the Federation Tower combines offices, apartments, an observation deck, restaurants, and infrastructure under one roof. This is a full-fledged multifunctional complex where you can work, live, dine, and relax without leaving the building.

The main difference between an MFC and a BC: a business center is tailored for offices, while a multifunctional complex combines offices with housing, retail, and entertainment. An MFC offers richer infrastructure but is generally more expensive.

Office classes: A, B, C — general logic

The classification of office real estate is a system for evaluating a building's quality. In Russia, a classification based on international standards is used. A class is assigned based on a combination of parameters: location, building structure, engineering, parking, management, and infrastructure.

The higher the class, the higher the quality, comfort, and cost. The basic logic is simple:

• Class A — top-quality premium offices
• Class B — high-quality mid-segment offices
• Class C — entry-level budget offices

Within the classes, there are subcategories: A+, A, B+, B-. The premium segment is sometimes distinguished separately as Prime or Trophy — these are the best properties on the market.

Class A offices: premium segment

Class A offices are top-quality buildings, typically newly built, located in prestigious business districts. This is the choice of large corporations, banks, international companies, and representative offices.

Key characteristics of Class A:

• Location — prestigious business zones (in Moscow — Moscow City, the center, key highways)
• Year of construction — a new or recently reconstructed building
• Engineering — modern ventilation and air conditioning systems (usually central four-pipe), multiple independent power supply sources, system redundancy
• Layouts — open floors (open space) with flexible layout, high ceilings, panoramic glazing
• Elevators — high-speed elevators from renowned manufacturers in sufficient quantities
• Parking — underground parking with an adequate number of parking spaces
• Management Involvement — professional management company, high-level service
• Security — 24/7 security, video surveillance, access control
• Infrastructure — restaurants, cafes, ATMs, conference halls

Subcategory А+ — these are the best representatives of the class, often part of landmark MFCs. For example, offices in the Moscow City towers belong to the premium segment of Class A.

Class B offices: mid-range segment

Class B offices are high-quality workspaces that yield to Class A in certain parameters but offer a good balance of price and quality. A popular choice among medium-sized businesses.

Class B is usually divided into two subcategories:

Class B+ — close to Class A, but with minor deviations: possibly a less prestigious location, slightly simpler engineering, or finishes. Often these are reconstructed buildings or Class A properties that have lost some characteristics over time.

Class B- — a simpler option: older buildings, simpler engineering (for example, split systems instead of central air conditioning), parking may be surface-level or limited.

Typical characteristics of Class B:

• Location in business districts, but not necessarily prestigious ones
• Buildings constructed in previous years or after reconstruction
• Functional, though less modern engineering
• Sufficient, but not excessive infrastructure
• Professional or basic management

Class C offices: budget segment

Class C offices are basic premises for business, focused on economy. Often these are repurposed buildings: former research institutes, administrative buildings, or Soviet-era manufacturing facilities.

Characteristics of Class C:

• Location — various districts, often industrial zones or outskirts
• Older buildings without major reconstruction
• Basic engineering — natural ventilation or simple systems, window vents
• Corridor-cabinet layout instead of open space
• Spontaneous or limited parking
• Minimal service, managed by the owner's resources
• Low rental cost

Class C is suitable for companies whose main priority is minimizing rental costs, while image and infrastructure are secondary.

Comparison of office classes: table

How to choose an office class for your company

Class A is suitable if image, a prestigious address, employee comfort, and hosting high-level guests are important to the company. These include banks, consulting firms, IT giants, representative offices, and headquarters. A Class A address works for the brand and helps attract talent.

Class B is a rational choice for a medium-sized business that needs high-quality conditions without overpaying for premium status. A good balance of comfort and cost.

Class C is for a company prioritizing cost minimization: warehouses with an office, manufacturing, small firms for which location and image are not critical.

When making a choice, consider not only the class but also the actual condition of a specific property, the management company's reputation, transport accessibility, and contract terms.

MFC and Class A in Moscow City

The top segment of Moscow's office real estate is concentrated in Moscow City — the largest cluster of Class A and Premium multifunctional complexes. The City towers combine top-class offices with retail, apartments, restaurants, and observation decks.

The standard of a premium office in an MFC is is the F-375 office penthouse on the 93rd–95th floors of the Federation Tower. This is not just a Class A office, but a unique tri-level property with an area of 2,642 sq. m under a glass dome at an altitude of 360–370 meters. The highest office in Europe — the peak of the entire office real estate classification.

Frequently Asked Questions

How does an MFC differ from a BC?

A BC (business center) is a building designed primarily for offices. An MFC (multifunctional complex) combines several functions: offices, retail, apartments or a hotel, and entertainment. The Moscow City towers are an example of an MFC. The main difference: a BC is tailored for offices, while an MFC integrates different types of real estate.

What is a Class A office?

A Class A office is a top-quality building in a prestigious location, featuring modern engineering, open layouts, underground parking, high-speed elevators, and professional management. It is the choice of corporations, banks, and international companies. The most expensive and comfortable segment.

What is the difference between office classes A, B, and C?

Class A represents top-quality premium offices in prestigious locations. Class B represents high-quality mid-segment offices offering a good balance of price and quality. Class C consists of basic entry-level premises, often in older buildings. Differences lie in location, engineering, infrastructure, and price.

Which office class is the most expensive?

The most expensive is Class A, especially the A+ subcategory and the premium segment. In Moscow, these are offices in Moscow City. The absolute peak is unique trophy properties, such as the F-375 penthouse in the Federation Tower, costing 4.16 million rubles per sq. m.

What does a Class B+ office mean?

Class B+ is an office close in quality to Class A, but with minor deviations: a slightly less prestigious location, simpler engineering, or finishes. Often these are reconstructed buildings or former Class A properties. A good option for medium-sized businesses.

In brief: MFC, BC, and office classes

• BC (business center) — a building primarily for offices
• MFC (multifunctional complex) — offices plus retail, housing, entertainment; example — Moscow City towers
• Class A — top-quality premium offices in prestigious locations
• Class B — high-quality mid-segment, balance of price and quality
• Class C — entry-level budget offices
• The peak of classification — Premium Class A properties in Moscow City MFCs

Are you interested in a top-class office in a multifunctional complex? Learn about the F-375 office penthouse in the Federation Tower, Moscow City — the highest office in Europe.