A painting brought down from a family wall may be worth a modest decorative sum, or it may be an overlooked work by a sought-after hand. The difference is rarely settled by a signature alone. A professional art appraisal considers the object in front of the valuer alongside the evidence behind it and the market prepared to buy it.
For owners, this matters most when a decision has to be made: whether to sell, insure, divide an estate, or simply understand what has been inherited. A sound appraisal replaces guesswork with an informed view of value and, just as importantly, identifies the most appropriate route to market.
What an art appraisal is designed to establish
An appraisal is an informed opinion of value, reached after examining a work’s authorship, date, medium, condition, provenance and market position. In auction practice, the purpose is usually to recommend a realistic estimate and reserve strategy for sale. This is not the same as placing an optimistic price on a painting because it resembles an expensive artist or because a similar subject has appeared online.
The key distinction is between a work’s inherent interest and its saleability. A well-painted nineteenth-century landscape may be attractive, but its estimate will depend on who painted it, the scale, subject, condition and whether comparable examples have recently found buyers. A smaller work by a recognised artist, with an exhibition label or family provenance, may command considerably more than a larger but anonymous picture.
There are also different forms of valuation. An auction valuation reflects what a work might reasonably achieve in a competitive sale, before the seller’s charges. An insurance valuation is generally based on replacement cost, which can be higher. Probate, division and private treaty valuations may each require a different basis. It is sensible to be clear about the purpose from the outset, as one figure does not serve every circumstance.
How specialists assess a painting or work of art
The first task is identification. A specialist will examine whether the artist’s name is secure, attributed, studio-related, circle of, after, or unknown. These are meaningful catalogue terms, not minor technicalities. They describe different levels of confidence and can have a substantial effect on value.
A signature is only one part of the evidence. Signatures may be added later, copied, misleadingly read, or genuinely present on a work by a pupil or follower. The painting’s handling, materials, support and subject matter must be considered together. Labels, inscriptions, old stock numbers and framing can also provide useful leads, although none should be treated as proof in isolation.
Condition follows closely behind attribution. Paintings are commonly affected by dirt, yellowed varnish, tears, old repairs, overpainting, craquelure, stretcher marks and previous lining. Some faults are entirely manageable, while others materially reduce collector interest. A work that appears dark and unremarkable may improve after careful cleaning, but restoration is never assumed to add value automatically. The likely cost, risk and benefit must be judged against the expected sale price.
Provenance can be decisive. A documented history of ownership may support attribution, reassure buyers and distinguish one example from another. Exhibition labels, sale catalogues, invoices, correspondence and family records should be retained, even where they appear mundane. Equally, gaps in provenance are common and do not necessarily prevent a sale. What matters is that the available evidence is described accurately and that any questions are addressed before cataloguing.
Finally, the valuer considers the present market. Auction records are useful, but they need interpretation. A record price achieved several years ago for an exceptional, large or extensively exhibited example may tell an owner very little about a smaller work in poorer condition. Demand changes by artist, genre and geography. Portraiture, marine painting, modern British art, contemporary works and certain regional schools can each behave differently from season to season.
Why photographs provide a starting point, not a final answer
Clear photographs are often enough to decide whether an item merits further examination. For an initial view, include the front and back, close images of the signature or inscription, frame labels, any damage, and measurements without the frame. Daylight photographs taken square-on are preferable to images obscured by glare.
However, photographs flatten surface detail and can conceal problems. They do not reliably show paint texture, old restoration, the quality of a support, or whether a signature sits naturally within the paint layer. Nor can they settle questions of scale or inspect a work’s reverse properly. A specialist viewing remains the proper basis for a firm auction appraisal, particularly where value may be significant.
Owners should avoid cleaning a painting before it is seen. Household products, water and improvised solvents can disturb varnish or paint, while an enthusiastic attempt to remove surface dirt can erase evidence that would assist identification. Leave dust and old labels in place, and handle works by the frame rather than the canvas or panel.
Estimates, reserves and the reality of auction value
An auction estimate is a guide to the likely hammer price, usually expressed as a range. It is not a guarantee, and it does not include the buyer’s premium paid by the successful purchaser. A reserve, agreed with the seller, is the confidential minimum hammer price below which the lot will not sell.
The strongest estimates are commercially credible. Setting an estimate too high can deter early interest and leave a lot exposed if bidding fails to develop. Setting it attractively may encourage multiple bidders, which is where auctions can produce their best results. The right approach depends on the work, the depth of demand and the quality of the supporting evidence.
There is a natural temptation to compare a family painting with the highest online price attached to an artist’s name. A specialist will instead compare like with like: authenticated works against authenticated works, similar media, dimensions, dates, subjects and condition. This is less dramatic, but it is how sensible expectations are formed.
At John Nicholson’s, valuations are considered in the context of the appropriate specialist sale and the bidders likely to engage with the work. That includes traditional saleroom buyers as well as collectors bidding through established online auction platforms. A work’s presentation, catalogue description, estimate and timing all contribute to the eventual result.
When further research is worthwhile
Some works justify deeper investigation before they are offered. This may involve consulting a catalogue raisonné, approaching a recognised authority, checking exhibition history, researching historic labels, or obtaining a condition report from a conservator. Such work is most useful where it could materially improve confidence in attribution or reveal a significant history.
It is not always proportionate. Spending heavily on research or restoration for a modestly valued decorative picture may not be commercially sensible. Conversely, a credible but unconfirmed attribution to an important artist may warrant patience and specialist scrutiny. The decision should be based on the possible difference in market value, not on sentiment alone.
Owners dealing with an estate should also resist the urge to distribute or discard items before a broad valuation has taken place. Pictures, prints, sketchbooks, bronzes and works on paper are easily overlooked, particularly when they have been stored in spare rooms, attics or portfolios. The unframed item can sometimes be the most consequential one.
Preparing for an art appraisal
Bring together any information that has travelled with the work: purchase receipts, prior valuations, insurance schedules, family notes, letters, exhibition catalogues and photographs of the picture in earlier settings. Record what is known, but separate fact from family belief. “Bought in Paris in the 1960s” is helpful information; “said to be by” should remain a starting point for research rather than a conclusion.
Do not replace an old frame, remove labels or commission restoration solely to make a work look more saleable before advice has been given. Original frames and marks of ownership may be relevant to its history. In some cases a clean, carefully presented work benefits from modest conservation; in others, preserving the object exactly as found is the wiser course.
A proper appraisal does more than attach a figure to an object. It gives an owner a basis for action: to consign with realistic expectations, insure appropriately, seek further expertise, or retain a work with a clearer understanding of its place in the market. When a painting may matter, careful examination is a modest investment in avoiding an expensive assumption.
