The cost to build a 20’×20′ room can vary significantly depending on factors such as location, materials used, labor costs, and the purpose of the room. On average, you might expect to spend anywhere from $10,000 to $30,000 or more for a basic room addition, but this is a rough estimate.

Latest estimation in India, hi guys in this article we know about construction cost of one room in India and their estimation and how much does it cost to build a 20 × 20 room.

**Estimation** is done for approximate calculation of quantity of material required and to find out their approximate cost. If you want to build a small room size 20’×20′. the question is arises in mind what would be their estimation.

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**1)what is concrete and its types and properties**

**2) concrete quantity calculation for staircase and its formula**

**Estimation of work** is done for knowing cost of construction, to check the financial budget, take a loan from a bank, to compare contractor cost.

Latest Estimation in 2021 to build 20×20 square room size, in this article we explain various types of material like brick cement concrete sand reinforcement require and their cost including Labour cost per square foot.

Whenever anyone decides to construct the house or room he will definitely want to know that estimation before allotting or starting the construction.

**How much does it cost to build a 20×20 room?** total construction cost for fully furnished one room 20’×20′ is around Rs 448775. This total cost includes cost of building construction, plastering, PCC flooring, tile flooring, electrical fitting, plumbing, painting putty and water and sanitization.

**How much does it cost to build a 20’×20′ Room**

Construction of one room and their cost calculation require quantity of material and their cost labour cost and cost of finishing like PCC flooring plastering tiling electrical fitting plumbing and water sanitization. Cost of construction of one room size 20’×20′ consist of material required and their estimation of following:-

**● Foundation PCC plinth beam and their cost.**

**● brick cost calculation, number of bricks, quantity of cement sand and their cost.**

**● concrete work, column, beam and slab.**

**● reinforcement quantity and their cost**

**● tile flooring quantity and their cost**

**● labour work and their cost.**

**1) Footing/ Foundation cost for room size 20’×20′.**

Let Foundation size is 4’×4′ and 4 feet depth, so volume of soil excavation for 4 footing = 4× 4’×4’×4′ = 256 cubic feet. Converting into cubic meter 256/35.32 =7.25m3. Soil excavation rate is around rs 800 per m3 for hard soil and rs 300 per m3 for soft soil. We take soil excavation rate Rs 400/m3 for this calculation.

Total cost of soil excavation for foundation = 7.25 × 400 = Rs 2900.

**2) Brick work quantity and cost calculation**

Assume room 20’×20′ have 9″ brick wall on four side height up to 10 feet and parapet wall for partition wall will be of 4.5 inch. Outer dimension of room is 21.5’×21.5′ and inner dimension of room excluding brick wall is 20’×20′.

Area of one brick wall having 10feet height =20’×10′ =200 sq foot

Area of 4 brick wall =4 ×200 = 800 sq foot.

Door size = 4’×7′ = 28 sq ft

Window size = 5’×6’= 30 sq ft

Door and window size should be deducted from total area of brick wall.

Net area of brick wall= 800 _ (28+30)= 742 sq ft

Volume of 9 inch thick brick wall = 742×9/12 = 556.5 cubic feet, converting into cubic meter we have 556.5/35.32=15.75 cubic meter.

Consider parapet brick wall 3.5 feet height 4.5 inch thick, and outer dimension of room is 21.5’×21.5′ = 182.25 sq ft, total area of parapet brick wall on all four side = 21.5 × 3.5 ×4 =301 sq ft.

Volume of parapet wall =( 4.5/12)×301=113 cubic ft, converting into cubic meter,113/35.32 = 3.2 cubic meter.

Total brickwork = 4 brick wall + parapet wall = 15.75+ 3.2 = 18.95 cubic meter.

Thumb Rule for brickwork:- 1 cubic metre of brickwork require 500 bricks, 1.26 bags of cement and 9.28 cubic feet sand quantity.

● **Brick quantity and their cost**: number of brick in 18.95 cubic meter = 500×18.95= 9475 nos, suppose first class brick rate is around rs 8000 per thousand, so brick cost = 8000× (9475/1000) = rs 75800.

● **Cement quantity and their cost:-** quantity of cement required for 18.95 cubic metre brickwork is 1.26 × 18.95 = around 24 bags cement. Suppose market rate of cement is around rupees 400 per bag so cement cost = 24×400= rs 9600.

● **Sand quantity and their cost:**– quantity of sand required for 18.95 cubic metre brick work is 9.28 × 18.95 = 176 cft. Market rate of sand is around rupees 40 per CFT then sand cost= 176 ×40 = rs 7040.

So total brickwork cost = brick cost + cement cost + sand cost = 75800 + 9600 + 7040 = rs 92440.

**3) Concrete quantity and cost calculation for footing,column,plinth beam,wall Beam and rcc slab.**

Footing is 4 feet depth and column size is 12 inch into 12 inch and height of column is 10 feet up to slab and 3.5 feet above slab. There is four column.

So column length is = 4’+10’+3.5’= 17.5′

Total volume of concrete quantity for 4 column = 4 × (12″×12″)×17.5′ =70 cubic feet.

Plinth beam size 9″×12″ for all around for length 21.5×4 = 86 feet. Total volume of concrete quantity for plinth beam = (9″×12″)× 86 = 64.5 cubic feet.

Wall beam size 12″×12″ for all around for length 21.5×4 = 86 feet. Total volume of concrete quantity for wall beam = (12″×12″)× 86′ = 86 cubic feet.

RCC slab 5 inch thick for 21.5’×21.5′, concrete volume is 21.5’×21.5’×5/12′ = 192.6 cft.

Total Weight volume of rcc concrete = concrete quantity for column + concrete quantity for RCC plinth beam + concrete quantity for RCC wall + concrete quantity for RCC slab = 70 +64.5+86+192.6 = 413 cft.

Converting 170cft into cubic metre,413/35.32 = 11.70m3. Ready mix concrete available in market is around rupees 4000 per m3 for M20 grade of concrete, so total material cost of concrete = 4000×11.70 = rs46800.

**4) Reinforcement cost and quantity calculation :**-suppose reinforcement required is 1% of concrete volume for RCC work like footing column beam and RCC slab.

Steel quantity = (1/100)×11.70m3 = 0.1170m3

Weight of steel = 0.1170m3 × 7850kg/m3 = 919kg, market rate of Steel is around 60 rupees per kg then total cost of Steel = 60×919 = rs 55140.

**5) Labour cost for construction of house** around 180 rupees per square foot without plastering and PCC or tile flooring.

So total outer area of one room is 21.5’×21.5 = 462.25 square foot, total labour cost = 180×462.25 = rs 83205.

Total cost for construction of one room = soil excavation cost + brick work cost + concreting cost + reinforcement cost + labour cost.

Total construction cost for one room = 2900+92440+46800+55140+83205 = Approx rs 280485.

Construction cost for one room **20’×20′** with parapet wall is around **Rs 280485**, this total cost includes soil excavation cost rs 2900, brickwork cost rs 92440, concrete cost rs 46800, steel cost rs 55140 and labour cost rs 83205 without plastering PCC and tile flooring.

Consider finishing cost is about 60% of total construction cost of one room, finishing should be required plastering, PCC flooring, tile flooring, putty painting, electrical fitting, plumbing, water and sanitization.

60% of construction cost of one room = (60/100)×280485= 168291.

Total cost =280485+168291 = rs 448775.

It cost to build fully furnished one room 20’×20′ is around rs 448775. This total cost includes cost of building construction, plastering, PCC flooring, tile flooring, electrical fitting, plumbing, painting putty and water and sanitization.