The number of bricks required for a house varies based on factors such as the size of the house, the type of bricks used, the design, thickness of the walls, and other architectural considerations. Generally a small 2-bedroom house might require about 10,000 bricks, a typical 3-bedroom house might need around 16,000 bricks, and a larger 4-bedroom house could require roughly 21,000 bricks.

The standard size of 2 Bedroom house (2bhk) is ranges between 650 to 800 square feet or 60 to 75 square meters. This is a good carpet area for 2 bedroom house that containing 2 bedroom, 1 hall, 1 kitchen, 2 toilet, 1 worship room and 1 dining/ living room.

A 3 BHK house generally has an average size of approximately 1,000 to 1,200 square feet (90 to 110 square meters). This is a good carpet area for 3 bedroom house that containing 3 bedroom, 2 hall, 1 kitchen, 2 toilet, 1 worship room, 1 dining room, 1 living room and 2 balcony.

A 4 BHK house generally has an average size of approximately 1,300 to 2,000 square feet (120 to 185 square meters). This is a good carpet area for 3 bedroom house that containing 3 bedroom, 2 hall, 1 kitchen, 2 toilet, 1 worship room, 1 dining room, 1 living room and 2 balcony.

As per general rules of thumb, the total internal and external walls area of house would be 3 times to carpet area of house. So minimum walls area for 2 bedroom house would be roughly 60 x 3 = 180 m2 or 75 x 3 = 225 m2, while minimum walls area for 3 bedroom house would be roughly 90 x 3 = 270 m2 or 110 x 3 = 330 m2. In addition, minimum walls area for 4 bedroom house would be roughly 120 x 3 = 360 m2 or 185 x 3 = 555 m2,

Generally there are 60 bricks per square meter for a half-brick wall or a one layer wall or single skin wall and 120 bricks per square meter for a one-brick wall or a double layer wall or double skin wall.

The total number of bricks for 2 bedroom house is: number of bricks = carpet area (square metres) x 60. So, number of bricks for 2 bedroom house = 180 x 60 = 10,800 bricks or 225 x 60 = 13,500 bricks. Therefore, you would need roughly something like 10,000 to 14,000 bricks for 2 bedroom house.

The total number of bricks for 3 bedroom house is: number of bricks = carpet area (square metres) x 60. So, number of bricks for 3 bedroom house = 270 x 60 = 16,200 bricks or 330 x 60 = 19,800 bricks. Therefore, you would need roughly something like 16,000 to 20,000 bricks for 3 bedroom house.

The total number of bricks for 4 bedroom house is: number of bricks = carpet area (square metres) x 60. So, number of bricks for 4 bedroom house = 360 x 60 = 21,600 bricks or 555 x 60 = 33,300 bricks. Therefore, you would need roughly something like 21,000 to 34,000 bricks for 4 bedroom house.

**However, I can provide you with a general estimate for how many bricks for a 2, 3 and 4 bedroom house:**

- A small 2-bedroom house might require anywhere from 10,000 to 14,000 bricks.
- A typical 3-bedroom house might need around 16,000 to 20,000 bricks.
- A larger 4-bedroom house could require roughly 21,000 to 34,000 bricks.

Conclusions:

Generally you would need roughly from 10,000 to 14,000 bricks for 2 bedroom house, around 16,000 to 20,000 bricks for 3-bedroom house and from 21,000 to 34,000 bricks for 4-bedroom house. These estimates can vary widely depending on the size of the rooms.