Can you help me estimate the cost of a residential project?
ChatGPT said:
Of course — I'd be happy to assist you with that.
To prepare an accurate and detailed estimate, could you
please provide a few key details about the project:
- Type
of residential project (e.g., single-family home, townhouse,
duplex)
- Size (square
footage)
- Number
of stories
- Location (general
area, for regional cost adjustments)
- Level
of finishes (standard, mid-range, high-end)
- Any
special features (basement, garage, decks, custom features)
Once I have this information, I will break the estimate down
into major construction activities with quantities, unit costs, and extended
costs.
Could you share those details with me?
You said:
Yes, Of course! a few key details about the project are: -
type of residential project: Single-family home - Size (square footage)
ChatGPT said:
Excellent — thank you for starting with that information.
Could you please tell me the size of the
home in square feet so I can proceed with calculating
quantities and costs?
Also, if you can, please include:
- Number
of stories (1-story, 2-story, etc.)
- Location (city
or region)
- Level
of finishes (standard, mid-range, high-end)
These details will help me tailor the estimate even more
accurately!
You said:
also, include: - 2story - Phnom Phenh city of Cambodia -
Level of finishes is standard
ChatGPT said:
Thank you — that’s very helpful!
Here’s a summary of your project so far:
- Type: Single-family
home
- Stories: 2
- Location: Phnom
Penh, Cambodia
- Level
of Finishes: Standard
The only missing piece is the size in square feet (or
square meters if you prefer).
Could you let me know the approximate size of the house?
Once I have that, I will prepare a full, detailed estimate
broken down by major construction activities.
You said:
the house size: 13.6m * 19.6m use
ChatGPT said:
Excellent — now we have a full picture to start estimating!
Here’s the basic data:
- Building
footprint: 13.6 m × 19.6 m = 266.56 m² per floor
- Stories: 2
- Total
floor area: 266.56 m² × 2 = 533.12 m²
(approximately 5,738 square feet)
Now, I will structure the estimate into major construction
activities:
- 1.
Sitework
- 2.
Foundation
- 3.
Structural Framing
- 4.
Roofing
- 5.
Exterior Finishes
- 6.
Interior Finishes
- 7.
Mechanical, Electrical, and Plumbing (MEP)
- 8.
Miscellaneous/Contingency
I’ll use standard construction costs for Cambodia in 2025
for a standard finish, which typically range around $300–$400/m² depending
on material selections.
For this estimate, I will use $350/m² as an average.
Preliminary Total Cost Estimate
|
Item |
Area (m²) |
Unit Cost ($/m²) |
Extended Cost ($) |
|
Total Construction |
533.12 |
350 |
186,592 |
Now, Detailed Breakdown by Major Activities:
1. Sitework
- Clearing
and Grading: 533.12 m² × $5/m² = $2,665
- Excavation
(foundation prep): 533.12 m² × $8/m² = $4,265
Sitework Subtotal: $6,930
2. Foundation
- Reinforced
concrete footings and slab: 533.12 m² × $60/m² = $31,987
Foundation Subtotal: $31,987
3. Structural Framing
- Concrete
columns, beams, 2nd floor slab: 533.12 m² × $90/m² = $47,981
Framing Subtotal: $47,981
4. Roofing
- Steel
roof frame + concrete tiles or metal sheet: 266.56 m² × $40/m² = $10,662
Roofing Subtotal: $10,662
5. Exterior Finishes
- Walls
(plastering, painting): 533.12 m² × $20/m² = $10,662
- Windows
and Doors (standard aluminum and wood): 533.12 m² × $30/m² = $15,994
Exterior Finishes Subtotal: $26,656
6. Interior Finishes
- Floor
finishes (ceramic tiles, standard): 533.12 m² × $20/m² = $10,662
- Interior
walls (plastering, painting): 533.12 m² × $15/m² = $7,997
- Ceilings
(gypsum board standard): 533.12 m² × $15/m² = $7,997
Interior Finishes Subtotal: $26,656
7. Mechanical, Electrical, and Plumbing (MEP)
- Electrical
system installation: 533.12 m² × $20/m² = $10,662
- Plumbing
system (cold water, basic fixtures): 533.12 m² × $15/m² = $7,997
MEP Subtotal: $18,659
8. Miscellaneous / Contingency
- Contingency
(5% of construction cost): 5% × $186,592 = $9,330
Summary Table
|
Major Activity |
Subtotal ($) |
|
Sitework |
6,930 |
|
Foundation |
31,987 |
|
Structural Framing |
47,981 |
|
Roofing |
10,662 |
|
Exterior Finishes |
26,656 |
|
Interior Finishes |
26,656 |
|
MEP (Mechanical, Electrical, Plumbing) |
18,659 |
|
Contingency |
9,330 |
|
TOTAL ESTIMATED COST |
$178,861 |
Cost per Square Meter / Square Foot
- Per
m²: $178,861 ÷ 533.12 m² = $335.49/m²
- Per
ft²: $178,861 ÷ 5,738 ft² = $31.17/ft²
Notes:
- This
is a preliminary estimate based on standard construction
practices and costs in Phnom Penh.
- Prices
can vary based on site conditions, material selection, labor availability,
and builder pricing.
- This
does not include land costs, permits, furniture, landscaping, or major
custom features.
Would you also like me to create a more detailed itemized
breakdown (for example, listing how much rebar, concrete, brick, tile, etc.,
you would need)?
It would make it even more precise if you're preparing for budgeting or
tendering! 📋✨