It depends on the complexity of the project and your ability to do the job well yourself. Really consider whether you have the time, skills, tools, help, and legal knowledge of local regulations to get the job done.
While you could save up to an estimated 20% of the project cost doing the work yourself there are plenty of how-to books and workshops offered by home improvement stores to guide you be aware that you could also end up spending more money and time if you botch the job or unforeseen problems arise.
There are many qualified home improvement companies in Aurora but be sure to get a referral from someone who has used the company before.
Think, too, about resale value. If the quality of your work is less than professional, your home's value could drop. So, unless you're highly skilled or experienced, shy away from major home improvements that involve structural changes
Stick to building shelves, painting, and other minor improvements instead.