This study investigates the effectiveness of urban green spaces in mitigating noise pollution, addressing a critical environmental challenge in rapidly expanding cities worldwide. Despite increasing recognition of noise as a significant health hazard, limited research exists on quantifying the acoustic benefits of strategic vegetation placement in urban settings. We present findings from a comprehensive case study in Dubai’s financial district, where measurements conducted at three monitoring points revealed ambient noise levels exceeding 63 dB(A). Through acoustic modeling using DataKustik’s CadnaA software compliant with international standards, we demonstrate that strategically implemented green spaces can reduce noise levels by 7–10 dB(A) in adjacent building facades. Buildings benefiting from green buffer zones exhibited noise levels between 57 and 60 dB(A), compared to 61–67 dB(A) in areas without vegetation, resulting in significant construction cost savings through reduced acoustic insulation requirements. Our research confirms that vegetation density, substrate composition, and strategic placement significantly influence sound attenuation performance. These findings provide valuable guidance for urban planners and architects in developing sustainable cities where green infrastructure serves multiple functions: aesthetic enhancement, environmental benefit, and acoustic comfort. The study establishes a quantitative framework for integrating acoustic considerations into green space design, contributing to healthier urban environments and improved quality of life for city dwellers.