It doesn’t. The only difference is that when you use traditional building methods, the envelope of the house - floor, walls and roof - are constructed on site.
Using panelized methods, the building envelope is constructed in a controlled environment. The construction crew is not affected by weather, lack of materials at hand, or the other obstacles that arise whenever one is building a house on site.
When a house is built on site, workers construct one panel of the house at a time, e.g. a section of a floor or wall, and add each new panel to those already in place. Door and window openings are ‘roughed in’ and the windows and doors are installed after the framing is complete
The method we use is to have the panels built with
windows and exterior doors installed under
controlled conditions in a production facility
just as most roof trusses are. The panels are
brought to the site on a flatbed truck and
assembled by our skilled framing crew with the
assistance of a crane. This
process allows us
to construct your home more efficiently in a
much faster time frame with high quality materials
and with reduced labor costs at the home site.

Panelized house 30 work days Stick-built house 90 days after
after construction started construction started. Still not
enclosed due to delivery and
weather problems
Panelized construction also reduces waste and the
cost of removing it. Click on noted
architect Sarah Susanka’s webpage about the
efficiency of panelized housing:
http://www.notsobighouse.com/panelization.asp
Once the house is enclosed, it is finished in the
same manner as traditional construction: electric,
plumbing and HVAC rough-in, insulation, dry wall,
paint, trim, cabinets and other built-ins, and
electric, plumbing, and HVAC completion. This type
of construction provides you with total design
flexibility. We can build any home design - stock,
custom, or your own - or you can take a stock plan
and modify it. We can build an 1800 sq.ft. bungalow,
a 3500 sq. ft. cape cod, a 4500 sq. ft. contemporary,
or a 6000 sq. ft. mansion.
If you need some architectural assistance modifying a stock plan, we work with architects who will consult with you and make modifications at a reasonable hourly rate. Whatever style or size house you want, it will be constructed to the highest standards.
Click on the photo to see the sequence of steps followed in building a panelized house.