When it comes to quality, safety and efficiency, office buildings are typically grouped into different classification types. Most office buildings fall into one of three classes: Grade A, Grade B or Grade C. Standards vary by market and city, but each grade is defined relative to the others, so developers, investors and prospective tenants can identify and compare buildings consistently.
Quick answer
Grade A buildings are the newest, best-located and most technically advanced offices in a market, commanding the highest rents. Grade B buildings are solid, functional, and usually older or slightly further from the core CBD, at more moderate rents. Grade C buildings are the oldest stock, often needing renovation, and command the lowest rents. Classification depends on age, location, floor plate size, building systems, certifications and management quality — not on any single formal international standard.
Classification allows for differentiation between buildings, which makes it easier to rationalise market data — asking and transacted rent, and sales price. This data is critical when deciding on the right asset for individual or corporate use. Classification isn’t an exact science, but each grade has general characteristics that are easily identifiable. Here are a few of them.
Grade A
As the name suggests, this class is reserved for the highest quality buildings in a market. Grade A buildings generally feature the best aesthetics, constructed to the best specifications with top-grade building infrastructure.
Besides a prestigious address, the most common specifications of a Grade A office building include a floor plate of at least 20,000 sq ft, full floor-to-ceiling height, an intelligent-access lift lobby, raised flooring, and fibre-optic readiness.
Grade A buildings must also be strategically located, typically right in the centre of the CBD, with exceptional building management. A “Grade A+” tier exists for buildings that go above and beyond on quality, maintenance and management — buildings such as Guoco Tower or CapitaSpring in Singapore are commonly cited examples. As a result, Grade A buildings attract the highest-calibre tenants — multinational corporations, technology unicorns, and banking institutions — while commanding the highest rents.
Grade B
Grade B developments are generally considered decent quality and well-built. They may lack the high-end fixtures, architectural details or impressive lobbies of Grade A space, but they remain fully functional in terms of structure and layout.
Location, building systems, property management and facilities in Grade B buildings usually rank average to above average. Many Grade B buildings sit in suburban areas or on the edge of prominent financial districts, and tend to command “average” market rent — making Grade B one of the more common choices for SMEs.
Age is often the deciding factor between Grade A and Grade B: Grade B buildings are typically older, and some experience visible wear over time. A building can start out as Grade A and be reclassified as Grade B after a decade or so, once signs of ageing become apparent.
Grade B buildings remain very much in demand — not every business needs to be in a Grade A tower. A number of Grade B buildings also share the same prestigious CBD addresses as their Grade A neighbours.
Grade C
Grade C is typically used for older office buildings, often around the 20-year mark or beyond. These buildings may sit in less prominent or desirable areas, and usually need extensive renovation to restore their appeal. Grade C offices tend to have older or minimal technological infrastructure.
Occupied Grade C properties command lower rental rates and generally attract smaller businesses — tenants who either don’t have the budget for bigger, more impressive space, or don’t require a centralised CBD address.
Grade C buildings can sometimes be upgraded to Grade B through Asset Enhancement Initiatives (AEI) and major repairs. Reaching Grade A status afterwards is unlikely, mostly due to location and the building’s visible age.
These are the general classification types office buildings fall into. Bear in mind these are guidelines rather than a formal international standard — classification can be somewhat subjective, and a number of factors (amenities, location, market conditions) come into play. Still, overall quality is something worth keeping in mind during lease negotiations.
What decides an office building’s classification?
A combination of factors determines a building’s actual grade:
- Property age
- Location
- Accessibility
- Floor plate size
- Number and speed of elevators
- Lobby access system
- Construction certification, e.g. Green Mark
- Onsite amenities and facilities
- Links to public transport / MRT stations
Frequently asked questions
What is the main difference between Grade A and Grade B office space?
Grade A buildings offer newer specifications, larger floor plates, top-tier building management and prime CBD addresses. Grade B buildings are still fully functional and well-located, but usually older, with more modest specifications and rent.
Can a Grade B building become Grade A?
It’s uncommon. A building’s classification depends heavily on age and location, which can’t be changed. Major refurbishment can improve a building’s standing, but rarely enough to reach true Grade A status.
Is Grade A office space worth the higher rent?
For companies that need to attract talent, host clients, or project a certain image — MNCs, financial institutions, and high-growth tech firms — Grade A space often justifies the premium. For other businesses, a well-located Grade B building can offer better value.
What is a “Grade A+” building?
Grade A+ is an informal tier used for Grade A buildings that go beyond standard expectations on quality, maintenance and management — typically the newest, most prestigious towers in a market.
Does Green Mark certification affect a building’s grade?
Sustainability certification (such as Green Mark in Singapore) is one factor building managers and tenants weigh when assessing quality, alongside age, location, floor plates and building systems — it isn’t the sole determinant of grade.
Not sure what grade of office space your organisation should be relocating to? Talk to us today and we’ll advise you on the widest range of options.
