Hiring a professional to care for your grass will help avoid patches, browning and pests or diseases. On average, homeowners spend about $165 on lawn services although that varies based on the types of treatments a lawn needs. Here are some cost considerations when youre looking at services. The national average estimate for lawn mowing and maintenance is between $214 and $322. It will often include a cut, weeding, trimming and pesticide treatment. Some services will price individually, while others will have monthly or weekly packages.