Increased threat of mosquito-borne disease coupled with decreased acceptance of nuisance mosquitoes has opened a market for pest management professionals to offer mosquito control services marketed to homeowners. Two pyrethroids, lambda-cyhalothrin and deltamethrin, were applied in residential landscapes as barrier treatments at their mid-range label rates. We tested their residual efficacy at reducing adult mosquito populations compared against a water control at 24 residential properties (eight replications of each of the three treatments). We monitored mosquito populations at each residence using five trapping METHODS: CO2-baited CDC light traps (without a light and mounted at heights of 1.5 and ~7m), human landing rates, CDC gravid traps, ovitraps, and sweep nets. Populations were monitored weekly for 10 wk, 2 wk prior to treatment and 8 wk post treatment. Residual efficacy of each insecticide was confirmed by randomly selecting leaves from each yard and performing a no-choice bioassay with laboratory-reared Aedes albopictus (Skuse) and Culex pipiens L. Additionally, homeowners completed surveys to assess their attitudes towards mosquitoes and treatment effectiveness. Backyard monitoring and residual bioassay results from a previous study, at maximum label rates, suggested lambda-cyhalothrin significantly controlled Aedes and Ochlerotatus spp., but did not control Culex spp.. Additionally, homeowners were highly satisfied with their results. Results from this study will be presented.