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Interior design is the art and science of enhancing the interior of a building to achieve a healthier and more aesthetically pleasing environment for the people using the space. With a keen eye for detail and a creative flair, an interior designer is someone who plans, researches, coordinates, and manages such enhancement projects. Interior design is a multifaceted profession that includes conceptual development, space planning, site inspections, programming, research, communicating with the stakeholders of a project, construction management, and execution of the design.

In the past, interiors were put together instinctively as a part of the process of building.^[1]

The profession of interior design has been a consequence of the development of society and the complex architecture that has resulted from the development of industrial processes.

The pursuit of effective use of space, user well-being and functional design has contributed to the development of the contemporary interior design profession. The profession of interior design is separate and distinct from the role of interior decorator, a term commonly used in the US; the term is less common in the UK, where the profession of interior design is still unregulated and therefore, strictly speaking, not yet officially a profession.

In ancient India, architects would also function as interior designers. This can be seen from the references of Vishwakarma the architect—one of the gods in Indian mythology. In these architects' design of 17th-century Indian homes, sculptures depicting ancient texts and events are seen inside the palaces, while during the medieval times wall art paintings were a common feature of palace-like mansions in India commonly known as havelis. While most traditional homes have been demolished to make way to modern buildings, there are still around 2000 havelis^[2] in the Shekhawati region of Rajashtan that display wall art paintings.

In ancient Egypt, "soul houses" (or models of houses) were placed in tombs as receptacles for food offerings. From these, it is possible to discern details about the interior design of different residences throughout the different Egyptian dynasties, such as changes in ventilation, porticoes, columns, loggias, windows, and doors.^[3]

Painting interior walls has existed for at least 5,000 years, with examples found as far north as the Ness of Brodgar,^[4] as have templated interiors, as seen in the associated Skara Brae settlement.^[5] It was the Greeks, and later Romans who added co-ordinated, decorative mosaics floors,^[6] and templated bath houses, shops, civil offices, Castra (forts) and temple, interiors, in the first millennia BC. With specialised guilds dedicated to producing interior decoration, and formulaic furniture, in buildings constructed to forms defined by Roman architects, such as Vitruvius: De architectura, libri decem (The Ten Books on Architecture).^[7][8]

Throughout the 17th and 18th century and into the early 19th century, interior decoration was the concern of the homemaker, or an employed upholsterer or craftsman who would advise on the artistic style for an interior space. Architects would also employ craftsmen or artisans to complete interior design for their buildings.

In the mid-to-late 19th century, interior design services expanded greatly, as the middle class in industrial countries grew in size and prosperity and began to desire the domestic trappings of wealth to cement their new status. Large furniture firms began to branch out into general interior design and management, offering full house furnishings in a variety of styles. This business model flourished from the mid-century to 1914, when this role was increasingly usurped by independent, often amateur, designers. This paved the way for the emergence of the professional interior design in the mid-20th century.^[9]

In the 1950s and 1960s, upholsterers began to expand their business remits. They framed their business more broadly and in artistic terms and began to advertise their furnishings to the public. To meet the growing demand for contract interior work on projects such as offices, hotels, and public buildings, these businesses became much larger and more complex, employing builders, joiners, plasterers, textile designers, artists, and furniture designers, as well as engineers and technicians to fulfil the job. Firms began to publish and circulate catalogs with prints for different lavish styles to attract the attention of expanding middle classes.^[9]

As department stores increased in number and size, retail spaces within shops were furnished in different styles as examples for customers. One particularly effective advertising tool was to set up model rooms at national and international exhibitions in showrooms for the public to see. Some of the pioneering firms in this regard were Waring & Gillow, James Shoolbred, Mintons, and Holland & Sons. These traditional high-quality furniture making firms began to play an important role as advisers to unsure middle class customers on taste and style, and began taking out contracts to design and furnish the interiors of many important buildings in Britain.^[10]

This type of firm emerged in America after the Civil War. The Herter Brothers, founded by two German émigré brothers, began as an upholstery warehouse and became one of the first firms of furniture makers and interior decorators. With their own design office and cabinet-making and upholstery workshops, Herter Brothers were prepared to accomplish every aspect of interior furnishing including decorative paneling and mantels, wall and ceiling decoration, patterned floors, and carpets and draperies.^[11]

A pivotal figure in popularizing theories of interior design to the middle class was the architect Owen Jones, one of the most influential design theorists of the nineteenth century.^[12] Jones' first project was his most important—in 1851, he was responsible for not only the decoration of Joseph Paxton's gigantic Crystal Palace for the Great Exhibition but also the arrangement of the exhibits within. He chose a controversial palette of red, yellow, and blue for the interior ironwork and, despite initial negative publicity in the newspapers, was eventually unveiled by Queen Victoria to much critical acclaim. His most significant publication was The Grammar of Ornament (1856),^[13] in which Jones formulated 37 key principles of interior design and decoration.

Jones was employed by some of the leading interior design firms of the day; in the 1860s, he worked in collaboration with the London firm Jackson & Graham to produce furniture and other fittings for high-profile clients including art collector Alfred Morrison as well as Ismail Pasha, Khedive of Egypt.

In 1882, the London Directory of the Post Office listed 80 interior decorators. Some of the most distinguished companies of the period were Crace, Waring & Gillowm and Holland & Sons; famous decorators employed by these firms included Thomas Edward Collcutt, Edward William Godwin, Charles Barry, Gottfried Semper, and George Edmund Street.^[14]

By the turn of the 20th century, amateur advisors and publications were increasingly challenging the monopoly that the large retail companies had on interior design. English feminist author Mary Haweis wrote a series of widely read essays in the 1880s in which she derided the eagerness with which aspiring middle-class people furnished their houses according to the rigid models offered to them by the retailers.^[15] She advocated the individual adoption of a particular style, tailor-made to the individual needs and preferences of the customer:

One of my strongest convictions, and one of the first canons of good taste, is that our houses, like the fish's shell and the bird's nest, ought to represent our individual taste and habits.

The move toward decoration as a separate artistic profession, unrelated to the manufacturers and retailers, received an impetus with the 1899 formation of the Institute of British Decorators; with John Dibblee Crace as its president, it represented almost 200 decorators around the country.^[16] By 1915, the London Directory listed 127 individuals trading as interior decorators, of which 10 were women. Rhoda Garrett and Agnes Garrett were the first women to train professionally as home decorators in 1874. The importance of their work on design was regarded at the time as on a par with that of William Morris. In 1876, their work – Suggestions for House Decoration in Painting, Woodwork and Furniture – spread their ideas on artistic interior design to a wide middle-class audience.^[17]

By 1900, the situation was described by The Illustrated Carpenter and Builder:^[18]

Until recently when a man wanted to furnish he would visit all the dealers and select piece by piece of furniture ....Today he sends for a dealer in art furnishings and fittings who surveys all the rooms in the house and he brings his artistic mind to bear on the subject.

In America, Candace Wheeler was one of the first woman interior designers and helped encourage a new style of American design. She was instrumental in the development of art courses for women in a number of major American cities and was considered a national authority on home design. An important influence on the new profession was The Decoration of Houses, a manual of interior design written by Edith Wharton with architect Ogden Codman in 1897 in America. In the book, the authors denounced Victorian-style interior decoration and interior design, especially those rooms that were decorated with heavy window curtains, Victorian bric-a-brac, and overstuffed furniture. They argued that such rooms emphasized upholstery at the expense of proper space planning and architectural design and were, therefore, uncomfortable and rarely used. The book is considered a seminal work, and its success led to the emergence of professional decorators working in the manner advocated by its authors, most notably Elsie de Wolfe.^[19]

Elsie De Wolfe was one of the first interior designers. Rejecting the Victorian style she grew up with, she chose a more vibrant scheme, along with more comfortable furniture in the home. Her designs were light, with fresh colors and delicate Chinoiserie furnishings, as opposed to the Victorian preference of heavy, red drapes and upholstery, dark wood and intensely patterned wallpapers. Her designs were also more practical;^[20] she eliminated the clutter that occupied the Victorian home, enabling people to entertain more guests comfortably. In 1905, de Wolfe was commissioned for the interior design of the Colony Club on Madison Avenue; its interiors garnered her recognition almost over night.^[21][22] She compiled her ideas into her widely read 1913 book, The House in Good Taste.^[23]

In England, Syrie Maugham became a legendary interior designer credited with designing the first all-white room. Starting her career in the early 1910s, her international reputation soon grew; she later expanded her business to New York City and Chicago.^[24] Born during the Victorian Era, a time characterized by dark colors and small spaces, she instead designed rooms filled with light and furnished in multiple shades of white and mirrored screens. In addition to mirrored screens, her trademark pieces included: books covered in white vellum, cutlery with white porcelain handles, console tables with plaster palm-frond, shell, or dolphin bases, upholstered and fringed sleigh beds, fur carpets, dining chairs covered in white leather, and lamps of graduated glass balls, and wreaths.^[25]

The interior design profession became more established after World War II. From the 1950s onwards, spending on the home increased. Interior design courses were established, requiring the publication of textbooks and reference sources. Historical accounts of interior designers and firms distinct from the decorative arts specialists were made available. Organisations to regulate education, qualifications, standards and practices, etc. were established for the profession.^[23]

Interior design was previously seen as playing a secondary role to architecture. It also has many connections to other design disciplines, involving the work of architects, industrial designers, engineers, builders, craftsmen, etc. For these reasons, the government of interior design standards and qualifications was often incorporated into other professional organisations that involved design.^[23] Organisations such as the Chartered Society of Designers, established in the UK in 1986, and the American Designers Institute, founded in 1938,^[26] governed various areas of design.

It was not until later that specific representation for the interior design profession was developed. The US National Society of Interior Designers was established in 1957, while in the UK the Interior Decorators and Designers Association was established in 1966. Across Europe, other organisations such as The Finnish Association of Interior Architects (1949) were being established and in 1994 the International Interior Design Association was founded.^[23]

Ellen Mazur Thomson, author of Origins of Graphic Design in America (1997), determined that professional status is achieved through education, self-imposed standards and professional gate-keeping organizations.^[23] Having achieved this, interior design became an accepted profession.

Interior design is the art and science of understanding people's behavior to create functional spaces, that are aesthetically pleasing, within a building. Decoration is the furnishing or adorning of a space with decorative elements, sometimes complemented by advice and practical assistance. In short, interior designers may decorate, but decorators do not design.

Interior designer implies that there is more of an emphasis on planning, functional design and the effective use of space, as compared to interior decorating. An interior designer in fine line design can undertake projects that include arranging the basic layout of spaces within a building as well as projects that require an understanding of technical issues such as window and door positioning, acoustics, and lighting.^[1] Although an interior designer may create the layout of a space, they may not alter load-bearing walls without having their designs stamped for approval by a structural engineer. Interior designers often work directly with architects, engineers and contractors.

Interior designers must be highly skilled in order to create interior environments that are functional, safe, and adhere to building codes, regulations and ADA requirements. They go beyond the selection of color palettes and furnishings and apply their knowledge to the development of construction documents, occupancy loads, healthcare regulations and sustainable design principles, as well as the management and coordination of professional services including mechanical, electrical, plumbing, and life safety—all to ensure that people can live, learn or work in an innocuous environment that is also aesthetically pleasing.

Someone may wish to specialize and develop technical knowledge specific to one area or type of interior design, such as residential design, commercial design, hospitality design, healthcare design, universal design, exhibition design, furniture design, and spatial branding. Interior design is a creative profession that is relatively new, constantly evolving, and often confusing to the public. It is not always an artistic pursuit and can rely on research from many fields to provide a well-trained understanding of how people are often influenced by their environments.

Color is a powerful design tool in decoration, as well as in interior design, which is the art of composing and coordinating colors together to create a stylish scheme on the interior architecture of the space.^[27]

It can be important to interior designers to acquire a deep experience with colors, understand their psychological effects, and understand the meaning of each color in different locations and situations in order to create suitable combinations for each place.^[28]

Combining colors together could result in creating a state of mind as seen by the observer, and could eventually result in positive or negative effects on them. Colors can make the room feel either more calm, cheerful, comfortable, stressful, or dramatic. Color combinations can make a tiny room seem larger or smaller.^[29] So it is for the Interior designer to choose appropriate colors for a place towards achieving how clients would want to look at, and feel in, that space.^[28]

In 2024, red-colored home accessories were popularized on social media and in several design magazines for claiming to enhance interior design. This was coined the Unexpected Red Theory.

Residential design is the design of the interior of private residences. As this type of design is specific for individual situations, the needs and wants of the individual are paramount in this area of interior design. The interior designer may work on the project from the initial planning stage or may work on the remodeling of an existing structure. It is often a process that takes months to fine-tune and create a space with the vision of the client.^[30]

Commercial design encompasses a wide range of subspecialties.

• Retail: includes malls and shopping centers, department stores, specialty stores, visual merchandising, and showrooms.
• Visual and spatial branding: The use of space as a medium to express a corporate brand.
• Corporate: office design for any kind of business such as banks.
• Healthcare: the design of hospitals, assisted living facilities, medical offices, dentist offices, psychiatric facilities, laboratories, medical specialist facilities.
• Hospitality and recreation: includes hotels, motels, resorts, cruise ships, cafes, bars, casinos, nightclubs, theaters, music and concert halls, opera houses, sports venues, restaurants, gyms, health clubs and spas, etc.
• Institutional: government offices, financial institutions (banks and credit unions), schools and universities, religious facilities, etc.
• Industrial facilities: manufacturing and training facilities as well as import and export facilities.^[30]
• Exhibition: includes museums, gallery, exhibition hall, specially the design for showroom and exhibition gallery.
• Traffic building: includes bus station, subway station, airports, pier, etc.
• Sports: includes gyms, stadiums, swimming rooms, basketball halls, etc.
• Teaching in a private institute that offer classes of interior design.
• Self-employment.
• Employment in private sector firms.

Other areas of specialization include amusement and theme park design, museum and exhibition design, exhibit design, event design (including ceremonies, weddings, baby and bridal showers, parties, conventions, and concerts), interior and prop styling, craft styling, food styling, product styling, tablescape design, theatre and performance design, stage and set design, scenic design, and production design for film and television. Beyond those, interior designers, particularly those with graduate education, can specialize in healthcare design, gerontological design, educational facility design, and other areas that require specialized knowledge. Some university programs offer graduate studies in theses and other areas. For example, both Cornell University and the University of Florida offer interior design graduate programs in environment and behavior studies.

This article needs additional citations for verification. Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed. Find sources: "Home construction" – news · newspapers · books · scholar · JSTOR (January 2017) (Learn how and when to remove this message)

Home construction or residential construction is the process of constructing a house, apartment building, or similar residential building^[1] generally referred to as a 'home' when giving consideration to the people who might now or someday reside there. Beginning with simple pre-historic shelters, home construction techniques have evolved to produce the vast multitude of living accommodations available today. Different levels of wealth and power have warranted various sizes, luxuries, and even defenses in a "home". Environmental considerations and cultural influences have created an immensely diverse collection of architectural styles, creating a wide array of possible structures for homes.

The cost of housing and access to it is often controlled by the modern realty trade, which frequently has a certain level of market force speculation. The level of economic activity in the home-construction section is reported as housing starts, though this is contrarily denominated in terms of distinct habitation units, rather than distinct construction efforts. 'Housing' is also the chosen term in the related concepts of housing tenure, affordable housing, and housing unit (aka dwelling). Four of the primary trades involved in home construction are carpenters, masons, electricians and plumbers, but there are many others as well.

Global access to homes is not consistent around the world, with many economies not providing adequate support for the right to housing. Sustainable Development Goal 11 includes a goal to create "Adequate, safe, and affordable housing and basic services and upgrade slums".^[2] Based on current and expected global population growth, UN habitat projects needing 96,000 new dwelling units built each day to meet global demands.^[3] An important part of housing construction to meet this global demand, is upgrading and retrofitting existing buildings to provide adequate housing.

While homes may have originated in pre-history, there are many notable stages through which cultures pass to reach the current level of modernization. Countries and communities throughout the world currently exhibit very diverse concepts of housing, at many different stages of home development.

Two methods for constructing a home can be distinguished: the method in which architects simply assume free choice of materials and parts, and the method in which reclaimed materials are used, and the house is thus during its entire construction a "work in progress" (meaning every single aspect of it is subject to change at any given time, depending on what materials are found).

The second method has been used throughout history, as materials have always been scarce.

In Britain, there is comparatively little demand for innovative homes produced through radically different production methods, materials, and components. Over the years, a combination of trade protectionism and technical-product conservatism all round has also stymied the growth of indigenous producers of housing products such as aluminum cladding and curtain walling, wall tiles, advanced specialist ironmongery, and structural steel.^[4]

Civil Site Plans, Architectural Drawings and Specifications comprise the document set needed to construct a new home. Specifications consist of a precise description of the materials to be used in construction. Specifications are typically organized by each trade required to construct a home.

The modern family home has many more systems and facets of construction than one might initially believe. With sufficient study, an average person can understand everything there is to know about any given phase of home construction. The do it yourself (DIY) boom of the late twentieth century was due, in large part, to this fact. And an international proliferation of kitset home and prefabricated home suppliers, often consisting of components of Chinese origin has further increased supply and made DIY home building more prevalent.^[5]

The process often starts with a planning stage in which plans are prepared by an architect and approved by the client and any regulatory authority.^[6] Then the site is cleared, foundations are laid and trenches for connection to services such as sewerage, water, and electricity are established. If the house is wooden-framed, a framework is constructed to support the boards, siding and roof. If the house is of brick construction, then courses of bricks are laid to construct the walls. Floors, beams and internal walls are constructed as the building develops, with plumbing and wiring for water and electricity being installed as appropriate. Once the main structure is complete, internal fitting with lights and other fitments is done, Decorate home and furnished with furniture, cupboards, carpets, curtains and other fittings.^{[7][8][better source needed]}

To avoid running out of money, consider building your house in phases.^[9] This phased approach allows homeowners to prioritize essential components of the house, such as the foundation, structure, and basic utilities, while deferring less critical elements to later phases. It provides the flexibility to pause construction temporarily, if necessary, and resume when funds become available.

The cost of building a house varies by country widely. According to data from the National Association of Realtors, the median cost of buying an existing single-family house in the United States is $274,600, whereas the average cost to build is $296,652.^{[10][11][when?]} Several different factors can impact the cost of building a house, including the size of the dwelling, the location, and availability of resources, the slope of the land, the quality of the fixtures and fittings, and the difficulty in finding construction and building materials talent.^[12] Some of the typical expenses involved in a site cost can be connections to services such as water, sewer, electricity, and gas; fences; retaining walls; site clearance (trees, roots, bushes); site survey; soil tests.^[13]

• Architectural design
• Building Code

• Shallow foundation
• Light-frame construction or Post-frame construction
• Domestic water system
• Electrical wiring
• Building envelope
• Retaining walls

• Ventilation
• Plumbing
• Air conditioning
• Electrical wiring
• Telephone wiring
• Ethernet wiring
• Insulation
• Flooring
• Wall
• Ceilings
• Doors
• Windows

• Cabinetry
• Furnishings
• Interior decorating
• Painting
• Fixtures
• Appliances
• Toiletry