1. House Construction Budget Plan
Kihwan Lee
8/24/2018

2. Project Definition Objective: Plan: Reference:
Prepare a high level budget plan for building a residential house.
Plan:
Obtain a national average for house construction
Calculate house construction estimate from available data and compare to the national average
Define required items.
Address each items with rough estimates for each.
Apply system engineering approach rather than detailed plan for each step.
Construct a high level budget for building a house.
Reference:
Provide reference for each estimates

3. Budget Comparison on Single-Family Construction
National Average
Calculated Estimate
National Average
Estimate
Square Footage
2470
Cost/ft2
$117
Carpenter
$70/hr
Masons
Excavator
Electrician
$85/hr
Painters
$25~35/hr
Plumber
$45~65/hr
Total Material
$147k
Total Labor
$145k
Machine Cost
$5200
Total
$295k
Estimation
Cost
Note
Land
$0.0
Assuming the house is built on the currently owned land.
Foundation
$30k -
Building
$100k ~ $200k
Conservative estimate used between a container house and a manufactured home.
Water
$21k
Sewer
Electricity
$41k
Margin/Hidden cost
$50k
Unknown and unaccounted for cost.
Total
$251k ~ $361k

4. House Construction Contract Process
Project delivery method:
Design-bid-build
Procurement processes:
RFP
Contractor compensation structure:
firm-fixed-price

5. Architect and General Contractor
Provide the services and materials
Hire subcontractors
Suggest plans and ideas
Deliver final cleanup
Pull all the permits for work and utility installation
Total compensation: $40k
Architect
Determine scope
Draft a list of proposed work, budget, and outline
Create the schematic design
Finalize drawing and details
Serve as the project manager and obtain necessary permit
Serve in an advisory capacity
Complete construction document and obtain building permit.
Administer the construction
Total compensation: $30k ~ 50k

6. Platform frame + Sheathing Roof: Solar panel roof from Tesla
Hose Plan
Frame-to-Foundation
Roofing
Wall framing sheathing and bracing
Site-Built Home Plan
Foundation:
Concrete + Insulation
Frame:
Platform frame + Sheathing
Roof:
Solar panel roof from Tesla
Floor framing and bridging
Foundation
Details of Foundation

7. Home Construction Project Item Detailed Breakdown
Bath fixtures
Foundations, Piers, Flatwork
Rough Hardware
Built in Appliances
Garage Door
Unit Heating and Cooling
Cabinets
Heating and Cooling Systems
Windows
Carpeting
Insulation
Wiring
Countertops
Insurance
Kitchen
Doors
Interior Wall Finish
Roofing
Excavation
Lighting Fixtures
Paint
Exterior Finish
Painting
Miscellaneous
Exterior Trim
Permits and Utilities
Final Cleanup
Plans and Specs
Finish Carpentry
Plumbing Fixtures
Finish Hardware
Plumbing Rough-in and Connection
Fireplace and Chimney
Roofing, Flashing, Fascia
Flooring
Rough Carpentry

8. Requirement Overview Land: use currently owned land Utilities
Electricity: city or solar/wind
Sewer: city or septic tank
Water: city or well
Construction
Foundation: concrete
Main structure: on-site building/manufactured home/container house
Interior: kitchen/bathroom/bedroom/living room
Electricity/sewer/gas/heater/air-conditioner:

9. Cost Estimate: Land Residential site
Currently owned
Charlotte County
Address:
14380 Marlin ct, Placida Fl
Cost: yearly tax < $
Total cost: close to or less than $1,000.00

10. Cost Estimate: Electricity
Grid:
If the city electric system is located close to the property, the cost is assumed less than $41,000.00
Solar
Average house energy usage: 10kW
Average solar system installation cost: $4.00
Expected cost: ~$40,000.00
Permit: $
Total cost: close to or less than $41,00.00

11. Cost Estimate: Sewer Grid: Septic:
If the city septic system is located close to the property, the cost is assumed less than $21,000.00
Septic:
Installation: $20,000.00
Permit: $1,000.00
Total cost: close to or less than $21,000.00

12. Cost Estimate: Water Grid Well
If the city water system is located close to the property, the cost is assumed less than $21,000.00
Well
Water testing: $500.00
Permit: $500.00
Drilling/pump/pipe/other equipment: $20,000.00
Total cost: $21,000.00

13. Cost Estimate: Foundation
Expected cost for foundation: ~$30,000.00

14. Foundation Cost Breakdown
Cost/ft2
Cost/project
ft2
Material
Slab
$3 ~ $5
Footing
$1 ~ $2
Labor
$2 ~ $3
Leveling
$1000 ~ 2000
Permit
$1000
Size
2000
Total
$23k
National Average
$10k ~ 16k

15. Cost Estimate: Manufactured Home vs. Site Built Home
Double-wide
Total area around 2,000 ft2
Expected cost ~ $100,000.00, including typical installation cost.
Site-built home
Expected cost $200,000.00

16. Cost Estimate: Container Home
Main structure
Four 10’ x 40’ container as the main building
One 10’ x 20’ container as a car garage
4 x $5, x $3, = $23,000.00
Interior/plumbing/electricity
$50,000.00
Site installation/preparation
$30,000.00
Total cost of ~ $110,000.00

17. Summary Utility + Foundation cost ~ $103k.
Main Building cost ~ $100k ~ $200k.
Total cost:
$203k ~ 303k + 20 ~ 30% cost uncertainty
The total house construction cost becomes approximately $250k ~ 400k
Key findings
The site preparation cost is a significant portion of the entire project.
Container house cost is comparable to the manufactured house cost.
The site-built house cost about twice as much as either of the container house and manufactured house.

18. References Construction Technology, Lecture Notes