Apartment vs Condo vs Flat vs Suite vs Unit

When to use each in English, with meaning, register, and examples.

Apartment

Top 1,000 (very common) A1 noun

Condo

Top 5,000 (fairly common)

Flat

Top 1,000 (very common) A1 noun

Suite

Top 3,000 (common) C1 noun

Unit

Top 1,000 (very common) A2 noun

	Apartment	Condo	Flat	Suite	Unit
Pronunciation	🇬🇧 /["/əˈpɑːtmənt/"]/ 🇺🇸 /["/əˈpɑːrtmənt/"]/	🇬🇧 //ˈkɒndəʊ// 🇺🇸 //ˈkɑːndoʊ//	🇬🇧 /["/flæt/"]/ 🇺🇸 /["/flæt/"]/	🇬🇧 /["/swiːt/"]/ 🇺🇸 /["/swiːt/"]/	🇬🇧 /["/ˈjuːnɪt/"]/ 🇺🇸 /["/ˈjuːnɪt/"]/
Meaning	A place where people live, usually in a building with other homes.	A small apartment that is owned by someone.	Something that is smooth and level without bumps or hills.	A set of connected rooms in a hotel or a set of furniture.	A single part or piece of something.
Example	They have a beautiful apartment in the city center.	He bought a new condo in the city center.	The flat was spacious and filled with natural light.	a **hotel/private/honeymoon suite**	The unit of measurement for length is the meter.
Register	Neutral	Neutral	Neutral	Neutral	Neutral
How common	Top 1,000 (very common)	Top 5,000 (fairly common)	Top 1,000 (very common)	Top 3,000 (common)	Top 1,000 (very common)
CEFR level	A1	-	A1	C1	A2
Part of speech	noun		noun	noun	noun
Collocations	large, spacious, cramped, buy, lease, rent, block, building, complex, large, spacious, cramped, buy, lease, rent, block, building, complex, private, royal, state	buy a condo, condo fees, luxury condo, condo association	big, spacious, modest, block, have, own, rent, be located, face something, overlook something, at a/​the flat, in a/​the flat, convert something into flats, divide something into flats, make something into flats, coastal, tidal, mud, on the flat	private, luxury, bridal, a suite of offices, a suite of rooms, bathroom, bedroom, three-piece, a suite of furniture	large, small, basic, break something down into, divide something into, unit of analysis, basic, standard, monetary, produce, sell, cost, length, weight, unit of, per unit, army, combat, infantry, commander, intensive care, accident and emergency, casualty, kitchen, storage, vanity, install, basic, standard, monetary, produce, sell, cost, length, weight, unit of, per unit, kitchen, storage, vanity, install, dwelling, housing, residential, build
Antonyms	house, mansion	house, single-family home	curved, bumpy, uneven	single room, tight space	disunit, fragment, division
Common mistakes	Confused with 'flat' in British English, Using 'appartment' with incorrect spelling, Saying 'in the apartment' instead of 'at the apartment' in some contexts	Confused with 'apartment' - a condo is owned, not rented., Using 'condo' in discussions about hotels., Assuming all condos have the same features or amenities.	Confusing with 'plane' which refers to a geometric concept., Using 'flat' where 'flatter' is needed grammatically., Misusing as a verb; 'flat' is mainly an adjective.	Confused with 'suit' which is a type of clothing., Used for individual rooms instead of a collection., Spelled incorrectly as 'suit' in some contexts.	Confused with 'units' which is the plural form., Using 'unit' in non-count contexts where a countable noun is needed., Misunderstanding 'unit' as synonymous with 'group' instead of a single piece.
Usage notes	Use 'apartment' in everyday conversation. More common in American English than 'flat', used in British English. Avoid using in very formal contexts.	Commonly used in real estate; appropriate for discussions about housing and living arrangements. Avoid using in formal legal contexts.	Use 'flat' to describe surfaces, objects, or a person's mood. Not appropriate for describing people in a negative or rude way; can imply dullness if used for personality.	Use 'suite' when referring to hotel rooms or a group of related items. Avoid using in casual conversations about single rooms.	The word can be used in various contexts like math, science, and measurements. It's often used in formal contexts, but can also be used casually. Avoid using it when referring to groups or categories unless specifying a singular component.

See it in real clips

They furnished off an apartment with a two-room Roebucks sale

All right. Here's the apartment where the killing took place.

The Wire › S1 E1

Decomp in a vacant apartment.

They furnished off an apartment with a two-room Roebucks sale

All right. Here's the apartment where the killing took place.

Apartment

No, it's not like looking for a new condo.

Condo

Frequently asked questions: Apartment vs Condo vs Flat vs Suite vs Unit

What's the difference between Apartment, Condo, Flat, Suite, and Unit?

Apartment: A place where people live, usually in a building with other homes. Condo: A small apartment that is owned by someone. Flat: Something that is smooth and level without bumps or hills. Suite: A set of connected rooms in a hotel or a set of furniture. Unit: A single part or piece of something.

Which is more advanced: Apartment, Condo, Flat, Suite, and Unit?

Suite is the highest level, at C1, on the CEFR scale.

Can you show an example of each?

Apartment: They have a beautiful apartment in the city center. Condo: He bought a new condo in the city center. Flat: The flat was spacious and filled with natural light. Suite: a **hotel/private/honeymoon suite** Unit: The unit of measurement for length is the meter.

Can I use Apartment, Condo, Flat, Suite, and Unit interchangeably?

Not always. Apartment, Condo, Flat, Suite, and Unit are related and overlap in some contexts, but they differ in register, how common they are, and usage, so swapping one for another can change the meaning or tone. Check the differences above before substituting.