Most home building construction projects are estimated based on the prevailing cost of materials and the hourly wage to repair, install, or construct the project. Most contractors know their crews’ production rates and can estimate with accuracy.
However, some conditions that affect building costs are out of the contractor’s control. Material prices, for instance, rise and fall in accordance with the nationwide or worldwide supply and demand of lumber, cement, and raw materials. Production will also change with job site conditions, which can change by the hour (in the case of bad weather) or by the job (if there’s a shortage of materials, or if part of the work must be done from scaffolding or ladders).
Designing Your Own Home
Have you created your own design? For some, their home building dream includes actually drawing their own plans. I must caution you here. There is more to designing a home than meets the eye. If you are not experienced or trained, you can invest a lot of time just to find out that you need to have everything redone by a professional.
Good design includes things like; structural integrity, materials selection, code requirements, aesthetic appeal, traffic flow, lighting, views, and natures influence just to name a few.
Is an Architect Prepared House Plan a Must?
The short answer is usually not. The decision could be taken out of your hands, however. In the USA for instance, there are several states that will not approve plans created out of their state. Similarly, Home Owners Associations may require all plans be designed by their list of architects. Always check before you buy home plans online or from a catalog.
Hot or Cold Temperatures: Add 10 to 15 percent to your labor costs when working temperatures are above 95 degrees or below 40 degrees F. People don’t work as efficiently in extreme temperatures.
Confined Work Spaces: Add 15 to 25 percent to your labor costs when work needs to be performed using ladders, scaffolding, or in a crawl space.
Height Factor: Add one percent to your costs for each 10 feet of height that material must be lifted above ground level.
Tradesmen Skill Level: Add five to 40 percent to your labor costs for tradesmen with below-average skills.
Small Jobs: Add 30 to 50 percent to small jobs where fitting and matching of materials is required, adjacent surfaces have to be protected, and the job site is occupied during construction.
Major Disaster Work: Add 25 to 50 percent to your costs for work done following a major flood, fire, earthquake, tornado, or hurricane. Skilled labor may be in short supply and you’ll probably have to settle for whatever labor is available, and pay more for it as well.
Difficult Conditions: Add 10 to 35 percent to your costs for demanding specifications, rigid inspections, a demanding owner or an inexperienced architect.
While estimating construction work is a difficult skill, identifying workplace conditions can help you in determining a realistic labor cost for a job. Never make your estimate solely from the plans. Always visit the job site to determine actual conditions
Resource Author Francisco Rodriguez H.
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