The Cost of Building 4 flats in Nigeria varies among regions, so it is pertinent to consider all the factors particular to a certain region before making an estimate.

Basically, you might consider culminating the cost of a building times 4 to assume an estimate. That is very tricky and unreliable. In this article, we will give you a proper breakdown of the cost of building 4 flats in Nigeria.

**What is the Cost of Building 4 Flats in Nigeria?**

It is advisable to divide the building process into stages when figuring out how much it will cost to construct a 4-bedroom home in Nigeria. This is typical and beneficial for organizing your progress.

**Cost before building:**

Survey expenses: 110,000

Expenses on architectural design:100,000

Lawyer expenses: 40,000- 60,000

**Division of construction phases:**

- Earthwork and excavation
- Foundation (German floor).
- DPC to lintel level stage.
- Roofing Stage.
- Plastering / Finishing Stage.
- Painting Stage

**[Phase1] Price and Requirement for Earthwork Excavation**

**Total Estimate: 743,600**

**Materials Required for Earthwork**

- 115 planks, each measuring 1″ x 12″ x 3.60m, priced at NGN 1,500 per plank, amounts to NGN 172,500.
- 65 strutting planks, each measuring 4″ x 4″ x 3.60m, priced at NGN 1000 per plank, totals NGN 65,000.
- 26 bracing planks, each measuring 2″ x 2″ x 3.60m, priced at NGN 800 per plank, come to NGN 20,800.
- 2 bags of nails in various sizes (3″, 4″, and 5″), priced at NGN 10,000 per bag, a total of NGN 20,000.
- Labor for fixing Earthwork support on an area of 118 sqm, priced at NGN 500 per sqm, amounts to NGN 60,000.
- 17 nos (4-liter gallon) of anti-termite treatment, priced at NGN 3,600 per gallon, a total of NGN 64,600.
- Labor costs amount to NGN 25,000.
- 2 rolls of the damp-proof membrane, priced at NGN 6,000 per roll, a total of NGN 12,000.

**Total Estimate: 439,900**

**Materials Required for Binding**

- 3 bags of cement, priced at NGN 4,000 per bag, a total of NGN 12,000.
- 18 tonnes of stone dust, priced at NGN 2,800 per tonne, amounts to NGN 50,400.
- Labor costs at NGN 800 per bag sum up to NGN 2,400.

**Total Estimate: 64,800**

**Materials Required for Footing Foundation**

The trench work is carried out using a ratio of (1:2:4).

For the given quantities:

- 87 bags of cement, priced at NGN 4,000 per bag, a total of NGN 348,000.
- 23 tonnes of stone dust, priced at NGN 2,800 per tonne, amounting to NGN 64,400.
- 21 tonnes of granite, priced at NGN 2,750 per tonne, sum up to NGN 57,750.
- Labor costs at NGN 800 per cement bag amount to NGN 69,600.

**Total Estimate: 539,750.**

**Materials Required for a Foundation in Black Work**

The mortar mix has a ratio of 1 part cement to 6 parts of another component.

- 1 tonne of sand, priced at NGN 2,700 per tonne, amounts to NGN 2,700.
- 5 bags of cement, priced at NGN 4,000 each, a total of NGN 20,000.

**Total Estimate: 22,700**

**For the concrete filling (1:4:8):**

- 3 tonnes of sand, priced at NGN 2,700 per tonne, sum up to NGN 8,100.
- 6 bags of cement, priced at NGN 4,000 each, a total of NGN 24,000.
- 3 tonnes of granite, priced at NGN 2,750 per tonne, amount to NGN 8,250.
- 290 pieces of 9-inch vibrated blocks (including 10 percent wastage), priced at NGN 300 each, a total of NGN 87,000.
- Labor costs for blockwork at NGN 100 per block amount to NGN 29,000.
- Labor costs for filling concrete at NGN 2,000.

**Total Estimate: 158,350.**

**Materials Required for Flooring**

For the ground floor slab with the ratio (1:2:4), the quantities and costs are as follows:

- 173 bags of cement, priced at NGN 4,000 per bag, a total of NGN 692,000.
- 45 tonnes of stone dust, priced at NGN 2,800 per tonne, amounting to NGN 126,000.
- 42 tonnes of granite, priced at NGN 2,750 per tonne, sum up to NGN 115,500.
- Labor costs for casting concrete at NGN 1000 per bag total NGN 173,000.
- 53 planks, each measuring 1″ x 12″ x 3.60m, priced at NGN 1,500 per plank, amounting to NGN 79,500.
- 1 bag of nails of various sizes (3″, 4″, and 5″), priced at NGN 1,000.
- Labor costs for carpenter on formwork at NGN 28,125.
- 6 rolls of BRC Mesh Ref 142 (15m x 2.1m), priced at NGN 18,000 per roll, a total of NGN 108,000.

**Total Estimate: 543,625.**

**READ ALSO:**

- Cost Of Roofing 3 Bedroom Flat In Nigeria
- 10 Easy Steps to Estimate the Cost of Plastering Your House

**[Phase 2] Foundation (German floor)**

Moving to the next phase of construction, which starts where the German floor finishes. It includes wall divisions for the various rooms in the house and the primary block work. The materials listed below are merely approximations of what is included in the four-bedroom apartment shown above.

Once more, make sure you get a Bill of Quantities for your building plan because only then will you be able to determine the precise materials needed to construct your home. At the top of the stage, there is an end.

**Labour Requirement for Black Work Above DPC**

- Quantity: 1,650 numbers of 225mm Blocks
- Price per block: NGN 3000
- The total cost of blocks: NGN 495,000

Mortar (1:6) mix for jointing:

Quantity: 27 bags of cement

- Price per bag: NGN 4,000
- The total cost of cement: NGN 108,000
- Quantity: 7 tons of Stone dust
- Price per ton: NGN 2,800
- The total cost of stone dust: NGN 19,600
- Labor for Blockwork: (Price per block: NGN 45) Total cost of labor: NGN 74,250

**Total Estimate: 261,150.**

**[Phase 3] Requirement and Cost for Lintel Casting**

Lintel is cast in the ratio of 1:2:4.

- Quantity: 18 bags of cement
- Price per bag: NGN 3,800
- The total cost of cement: NGN 68,400
- Quantity: 5 tons of Stone dust
- Price per ton: NGN 2,800
- The total cost of stone dust: NGN 12,00
- Quantity: 5 tons of Granite
- Price per ton: NGN 2,750
- The total cost of granite: NGN 12,375
- Labor cost for casting Concrete: NGN 700 per bag
- Quantity of bags: 18 bags
- Total labor cost: NGN 12,600

**Formwork costs (to sides and soffit):**

Quantity: 39 lengths of 1″ X 12″ X 3.6m (Plank)

- Price per length: NGN 1,200
- The total cost of 1″ X 12″ X 3.6m planks: NGN 46,800
- Quantity: 35 lengths of 2” x 3″ x 3.6m plank
- Price per length: NGN 450
- Total cost of 2” x 3″ x 3.6m planks: NGN 15,750
- Quantity: 39 lengths of 2” x 2″ x 3.6m plank
- Price per length: NGN 350
- Total cost of 2” x 2″ x 3.6m planks: NGN 13,650
- Quantity: 0.42 bag of Nail Various Sizes (3″, 4″ & 5″ Sizes)
- Price per bag: NGN 9,000
- The total cost of nails: NGN 3,780
- Carpenter cost for formwork (42 sqm) at NGN 500 per sqm: NGN 21,000

**Reinforcement costs:**

- Quantity: 22 lengths of 10mm diameter reinforcement
- Price per length: NGN 1,650
- The total cost of 10mm diameter reinforcement: is NGN 36,300
- Quantity: 22 lengths of 12mm diameter reinforcement
- Price per length: NGN 3,400
- The total cost of 12mm diameter reinforcement: NGN 74,800
- Quantity: 0.20 roll of Binding Wire (25 kg/roll)
- Price per roll: NGN 11,500
- The total cost of binding wire: NGN 2,300
- Iron benders cost for reinforcement (392 kg) at NGN 50 per kg: NGN 19,600

**Total Estimate: 339,355.**

**[Phase 4] Requirements and Cost for Roofing**

The estimated costs for the roofing stage are as follows:

- Quantity: 19 lengths of 100 x 150mm hardwood timber (wall plate)
- Price per length: NGN 320
- The total cost of wall plates: NGN 6,080
- Quantity: 55 lengths of 50 x 150mm hardwood timber (tie beam)
- Price per length: NGN 400
- The total cost of tie beams: NGN 25,000
- Quantity: 61 lengths of 50 x 150mm hardwood timber (rafter)
- Price per length: NGN 400
- The total cost of rafters: NGN 24,400
- Quantity: 75 lengths of 50 x 100mm hardwood timber (kingpost/struts)
- Price per length: NGN 400
- The total cost of kingposts/struts: NGN 35,000
- Quantity: 242 lengths of 50 x 75mm hardwood timber (purlins)
- Price per length: NGN 300
- The total cost of purlins: NGN 72,600
- Labor cost for carcass (1618 m) at NGN 45 per meter: NGN 72,810
- Roof covering and capping cost (316 m2) at NGN 5,000 per m2: NGN 1,580,000
- Quantity: 62 pieces of hip plate and trimmer
- Price per piece: NGN 900
- The total cost of hip plates and trimmers: NGN 56,000
- Quantity: 798 pieces of roof nails (Galvanized nails)
- Price per nail: NGN 35
- The total cost of roof nails: NGN 27,930
- Labor cost for roof covering (316 m2) at NGN 500 per m2: NGN 158,000

**Total Estimate: 2,049,828.**

*Note: Woods should be treated before use.*

**[Phase 5] Requirements and Cost for Plastering**

Plastering, wiring, plumbing, and repairs to windows, doors, tiles, and other necessities are all part of this stage. The price here varies depending on the caliber of the supplies you use. We provide estimated prices for basic finishing:

- floor tiles: 450 x 450 x 10mm thick (144 m2) at NGN 2,100 per m2 = NGN 302,400.
- Skirting tiles: 889 pieces at NGN 50 each = NGN 44,450.
- Cement for fixing tiles: 23 bags at NGN 4,600 per bag = NGN 105,800.
- Labor cost for tiling (164 m2) at NGN 400 per m2 = NGN 65,600.

**For the screeding (floor) work:**

- 25 mm screeded bed C & S (1:4):
- 36 bags of cement at NGN 3,800 per bag = NGN 136,800.
- 6 tons of stone dust at NGN 2,800 per ton = NGN 15,000.
- Labor cost for screeding (164 m2) at NGN 400 per m2 = NGN 65,600.

**Requirement for Finishing Wall**

The cost breakdown for the plastering, tiling, and screened backing work is as follows:

**Plastering (wall):**

- 13mm screeded bed C & S (1:4):
- 58 bags of cement at NGN 3,800 per bag = NGN 220,400.
- 6 tons of stone dust at NGN 2,500 per ton = NGN 15,000.
- Labor cost for plastering (561 m2) at NGN 450 per m2 = NGN 252,450.

**Tiling (wall):**

- 200 x 400 vitrified tiles (115 m2) at NGN 3,500 per m2 = NGN 402,500.
- 16 bags of cement for fixing tiles at NGN 4,600 per bag = NGN 73,600.
- Labor cost for tiling (115 m2) at NGN 400 per m2 = NGN 46,000.

**Screened backing (wall):**

- 20 mm screened bed C & S (1:6):
- 14 bags of cement at NGN 4,000 per bag = NGN 56,000.
- 3 tons of sand at NGN 2,700 per ton = NGN 8,100.
- Labor cost for screeding (115 m2) at NGN 400 per m2 = NGN 46,000.

**Requirement for POP**

- 100 bags of P.O.P cement at NGN 4,000 per bag = NGN 400,000.
- 11 packs of concrete nails at NGN 2,500 per pack = NGN 27,500.
- 75kg of sponge at NGN 1,650 per kg = NGN 123,750.
- 3 rolls of binding wire at NGN 10,000 per roll = NGN 30,000.
- 3 rolls of imperial soap at NGN 1,500 per roll = NGN 4,500.
- 9 liters of groundnut oil at NGN 3,000 per liter = NGN 27,000.
- Labor cost for the ceiling (179 m2) at NGN 1,700 per m2 = NGN 304,300.

**Total Estimate: 1,027,150.**

**READ ALSO:**

**[Phase 6] Painting and Requirements and Cost **

**Wall Screeding:**

- 2 bags of screeding cement (white cement) at NGN 4,600 per bag = NGN 9,200.
- Labor cost for screeding (561 m2) at NGN 200 per m2 = NGN 112,200.

**Floating:**

- 2 bags of P.O.P cement at NGN 4,600 per bag = NGN 9,200.
- The labor cost of floating (561 m2) at NGN 200 per m2 = NGN 112,200.

**Painting and Decoration:**

- 8 drums of Delux Emulsion/texcote paint (20 Litres Drum) at NGN 20,000 per drum = NGN 160,000.
- Labor cost for painting (561 m2) at NGN 180 per m2 = NGN 100,980.

**Total Estimate: 503,780.**

**Requirement and Cost for Doors and Windows**

**Steel Doors:**

- 2 steel doors measuring 900 x 2100mm high at NGN 50,000 each = NGN 100,000.

**Wooden Doors:**

- 5 wooden doors overall size 900 x 2100mm high at NGN 37,800 each = NGN 189,000.
- 5 wooden doors overall size 750 x 2100mm high at NGN 31,500 each = NGN 157,500.

**Windows:**

- 2 windows size 750mm x 1500mm high at NGN 16,875 each = NGN 33,750.
- 4 windows size 750mm x 750mm high at NGN 8,437.50 each = NGN 33,750.
- 4 windows size 1500mm x 1500mm high at NGN 32,400 each = NGN 129,600.
- 1 window size 3600mm x 1800mm high at NGN 97,200 each = NGN 97,200.
- 5 windows size 2000mm x 1500mm high at NGN 45,000 each = NGN 225,000.

**Steel Burglary Bars:**

- 2 burglary bars for windows size 750mm x 1500mm high at NGN 7,875 each = NGN 15,750.
- 4 burglary bars for windows size 750mm x 750mm high at NGN 3,937.50 each = NGN 15,750.
- 4 burglary bars for windows size 1500mm x 1500mm high at NGN 15,120 each = NGN 60,480.
- 1 burglary bar for window size 3600mm x 1800mm high at NGN 45,360 each = NGN 45,360.
- 5 burglary bars for windows size 2000mm x 1500mm high at NGN 21,000 each = NGN 105,000.
- Other ancillaries budget: NGN 57,000.
- Labor budget: NGN 45,000.

**Total Estimate: 1,310,140.**

**Requirement and Cost for Mechanical Service **

The cost breakdown for the plumbing and mechanical installations is as follows:

**Water Closet (WC):**

- 5 approved water closets with 7.5 cisterns, complete with fittings for installation at NGN 27,500 each = NGN 137,500.

**Wash-Hand Basin (WHB):**

- 5 approved wash-hand basins, complete with installation accessories at NGN 15,000 each = NGN 75,000.
- Double Drainer, Double Bowl, Stainless Steel Sink:
- 2 approved double drainers, double bowl, stainless steel sinks with mixer taps, and installation accessories at NGN 25,000 each = NGN 50,000.

**Shower:**

- 5 shower trays with shower heads at NGN 30,000 each = NGN 150,000.

**Water Heater:**

- 4 Ariston water heaters with a capacity of 20 liters each at NGN 60,000 each = NGN 240,000.

**Trapped Floor Drains:**

- 5 stainless steel floor drains with a diameter of 50mm at NGN 2,500 each = NGN 12,500.

**Stainless Steel Fixtures:**

- 4 stainless steel soap dishes fixed to the wall at NGN 3,500 each = NGN 14,000.
- 5 stainless steel towel rails fixed to the wall at NGN 3,500 each = NGN 17,500.
- 5 stainless steel toilet roll holders fixed to the wall at NGN 2,500 each = NGN 12,500.

**Mirror:**

- 4 mirrors made of 4mm silvered float glass, measuring 460 x 610mm with pressed edges and mounted on the wall at NGN 15,000 each = NGN 60,000.

**Requirement and Cost for Plumbing **

**Inspection Chamber:**

- 4 inspection chambers sized 450 x 450 x 450mm deep, complete with earthwork and associated work at NGN 15,000 each = NGN 60,000.

**Manhole:**

- 2 manholes sized 600 x 600 x 600mm deep, complete with earthwork and associated work at NGN 17,000 each = NGN 34,000.

**Soak Away Pit:**

- Construction of an approved-size soak-away pit at NGN 300,000.

**Septic Tank:**

- Construction of an approved-size septic tank, complete with associated works at NGN 200,000.

**Provisional Sum:**

- The provisional sum for all piping and builder’s work (sum budgeted) at NGN 400,000.

**Total Estimate: 347,300.**

The total cost of building 4 flats in Nigeria is approximately NGN27,242,428. However, this is dependent on a lot of factors. So in order to get an accurate estimate, it is advisable to consult a professional architect or construction contractor who can evaluate your specific requirements and provide a detailed cost analysis based on the local market conditions.

By so doing, they will evaluate various factors such as the size of each flat, the number of rooms, the type of finishes, the structural design, and other factors that influence construction costs and give you an adequate estimate.