Cost of Sump Pump Installation. You can install a sump pump on your own for about $200. However, most people don’t have the experience or expertise to do the job properly. If you don’t know what you’re doing, it’s best to hire a professional. According to HomeAdvisor (formerly ServiceMagic), most homeowners spend around $850 to $1,200 for sump pump installation, with a national average of about $1,000. However, some spend as little as $350 and others spend more than $1,600.