The first thing would be to make sure you understand the requirements of your local jurisdiction. This is particularly important if you’re going online for plans. I recently had a potential client telling me how I had to be able to meet the price of an online plan house. I countered by pointing out the disclaimer on their website:
The plan purchaser is responsible for assuring the plan meets local codes and regulations. It is the responsibility of the plan purchaser to obtain any and all structural analysis, engineering and specifications that may be required in the municipality in which it is to be built. Plan purchaser is to verify all lot conditions and measurements before construction. Purchaser is responsible for additional expenses incurred in order to meet local code and engineering requirements.
Customer understands that the following conditions in your specific area may require additional engineering:
1. Wind / hurricane / tornado
2. Seismic / earthquake
3. Heavy snow
4. Flood potential
5. Soil instability
Customer understands that these plans include electrical that is limited to the location of outlets, lights and switches plus plumbing fixture locations. Heating and/or cooling equipment is based upon local climate and as such are not included in the typical drawings.
I explained that those plans were not much more than pretty pictures. So, basically, after buying those plans the client would still be responsible for a site design, confirming that the engineering for the structure met the local codes, HVAC design, and review of plumbing and electrical. Plus, those plans were “as is” for the layout. If you wanted any changes, that was an extra - whereas he wanted me to include in that price review and changes as we went along.
Basically, that “good deal” price he was seeing online was at most only a quarter of the work I’d put into a typical project.