The styles that resulted fall within several categories. In the mainstream of Georgian style were both Palladian architecture— and its whimsical alternatives, Gothic and Chinoiserie, which were the English-speaking world's equivalent of European Rococo. From the mid-1760s a range of Neoclassical modes were fashionable, associated with the British architects Robert Adam, James Gibbs, Sir William Chambers, James Wyatt, Henry Holland and Sir John Soane. Greek Revival was added to the design repertory, after about 1800. See also: Adam style, Georgian Dublin.
Georgian architecture is characterized by its proportion and balance; simple mathematical ratios were used to determine the height of a window in relation to its width or the shape of a room as a double cube. "Regular" was a term of approval, implying symmetry and adherence to classical rules: the lack of symmetry, where Georgian additions were added to earlier structures, was deeply felt as a flaw. Regularity of housefronts along a street was a desirable feature of Georgian town planning. Georgian designs usually lay within the Classical orders of architecture and employed a decorative vocabulary derived from ancient Rome or Greece. The most common building materials used are brick or stone. Commonly used colors were red, tan, or white. However, modern day Georgian style homes use a variety of colors.
Other features of Georgian style houses can include - roof to ground-level:
Georgian Architecture was widely disseminated in the English colonies of the time. In the American colonies, colonial Georgian blended with the neo-Palladian style to become known more broadly as 'Federal style architecture'. Georgian buildings were also constructed of wood with clapboards; even columns were made of timber, framed up and turned on an over-sized lathe. The College of William and Mary in Williamsburg, Virginia, is an excellent example of Georgian architecture in the Americas.
Unlike the Baroque style that it replaced, which was generated almost solely in the context of palaces and churches, Georgian had wide currency in the upper and middle classes. Within the residential context, the best remaining example is the pristine Hammond-Harwood House (1774) in Annapolis, Maryland. This house was designed by colonial architect William Buckland and modeled on the Villa Pisani at Montagnana, Italy as depicted in Andrea Palladio's I Quattro Libri dell'Architettura (Four Books Of Architecture).
The establishment of Georgian architecture, and the Georgian styles of design more generally, were to a large degree aided by the fact that, unlike earlier styles which were primarily disseminated among craftsmen through the direct experience of the apprenticeship system, Georgian was also spread through the new medium of inexpensive suites of engravings. From the mid-18th century, Georgian styles were assimilated into an architectural vernacular that became part and parcel of the training of every architect, designer, builder, carpenter, mason and plasterer, from Edinburgh to Maryland.
After about 1840 Georgian conventions were slowly abandoned as a number of Revival styles, including Gothic revival, enlarged the design repertoire. In the United States this style declined in popularity after the revolution, due to its association with the colonial regime; but later in the early decades of the twentieth century when there was a growing nostalgia for its sense of order, the style was revived and came to be known as the Colonial Revival. In Canada the United Empire Loyalists embraced Georgian architecture as a sign of their fealty to Britain, and the Georgian style was dominant in the country for most of the first half of the 19th century. The Grange, for example, a manor built in Toronto, was built in 1817.
The revived Georgian style that emergeed in Britain at the beginning of the 20th century is usually referred to as Neo-Georgian; the work of Edwin Lutyens includes many examples. Versions of the Neo-Georgian style were commonly used in Britain for certain types of urban architecture until the late 1950s, Bradshaw Gass & Hope's Police Head Quarters in Salford of 1958 being a good example. In both the United States and Britain, the Georgian style is still employed by architects like Quinlan Terry for private residences.