Lismore's architecture reflects its rich history, blending styles from the late 19th and early 20th centuries. Notable historical buildings include the old Council Chambers (1928), now the Richmond River Historical Society Museum, which houses a collection of regional artifacts and documents, including Aboriginal items. The Art Nouveau post office (1897), designed by W.L. Vernon, and the Italianate Australian Joint Stock Bank (1891), now the T & G Building, are key architectural landmarks. The classical revival courthouse (1883) and the Lismore Memorial Baths (1928), dedicated to World War I veterans, are further examples of the city's commitment to preserving its historical structures.

Religious architecture in Lismore is also prominent, with St. Andrew's Anglican Church (1904), St. Carthage's Roman Catholic Cathedral (1892–1907), and several other churches, including the Uniting Church (1908–09) and the Church of Christ (1923). Presentation House, originally a convent for the Presentation Sisters, now serves as the Catholic Schools Office for the Diocese of Lismore after extensive refurbishment.

The commercial city center has maintained many shopfronts dating back to the late 19th and early 20th centuries, with arcades such as the Star Court Arcade (1920s) offering shelter from subtropical weather. This preservation of historical architecture adds to Lismore’s charm, making it a hub for shoppers and visitors alike.

Residential architecture in Lismore features the "high set" style, which is common in Queensland. These homes are elevated, with the living areas on the first floor and open spaces beneath, which helped with ventilation and cooling during hot summers. Over time, many of these understories have been enclosed for additional purposes, such as garages or extra living spaces. Many houses are also designed with covered verandahs, which provide shade in the summer and protection from rain, making them ideal for the local subtropical climate.

In addition to its architectural beauty, Lismore offers a variety of parks and gardens. Some of these, like the Wilson Nature Reserve, preserve remnants of the "Big Scrub," the subtropical rainforest that once covered much of the region. Other green spaces, such as Rotary Park and those bordering the Wilsons River, enhance the city’s natural beauty and offer residents and visitors places to relax and enjoy outdoor activities. Lismore’s amenities reflect a balance between preserving its historical charm and embracing modern developments for a growing, vibrant community.