Do you need an appraiser or a conservator? How does condition affect value?
We are pleased to share a recent collaboration with The Roth|Escher Art Group for this fall edition of our newsletter! It has been a delight to work with Andrea Roth and The Roth|Escher Art Group Team to explore the relationship between art conservation and appraisal. We hope this collaboration offers valuable insights into how condition and value are intertwined, along with some of the many considerations involved in issues in art collecting.
Together, we share a commitment to helping clients look after their collections. Preservation Arts is always deeply grateful for opportunities to collaborate with our colleagues, industry partners, and clients.
We hope you enjoy this feature. As always, please don't hesitate to reach out to discuss any conservation projects.
Enjoy!
Robin Bernhard, Vice President
What does it mean to care for a work of art?
Two complementary perspectives
Caring for a work of art means more than keeping it looking its best. It means understanding its materials, history, condition, significance, and purpose. Conservation and appraisal bring different expertise to that task:
The conservator evaluates physical condition, deterioration, preservation needs, and appropriate treatment options.
The appraiser develops an independent, evidence-based opinion of value for a defined purpose, considering the relevant market and circumstances of the assignment.
Together, these perspectives can help owners make informed decisions about care, insurance, sale, donation, and estate planning.
Condition matters – but its effect on value varies
Condition is one factor in an appraisal, not a value conclusion on its own. Its significance depends on the artwork, the nature and extent of the issue, and the market for that particular work.
Common condition concerns:
Paintings: flaking or lifting paint; losses, cracks, tears, punctures, or canvas distortion; surface grime; discolored or excessive varnish; previous repairs, overpainting, or extensive inpainting.
Works on paper: staining, discoloration, and foxing; folds, creases, tears, and losses; adhesive residue, tape, or unsuitable backing; fading from light exposure.
Sculpture and three-dimensional objects: chips, cracks, losses, corrosion, surface abrasion, unstable joins, previous repairs, or deteriorating finishes. Materials such as metal, stone, wood, ceramic, glass, and mixed media each present different needs.
How condition may affect value:
Stable signs of age or minor wear may have little effect, particularly for older works.
Significant losses, structural instability, or extensive overpainting may reduce market appeal or raise questions for buyers.
Discolored varnish or grime can obscure an artist’s palette and visual effects; a conservator can assess whether treatment is appropriate.
Conservation may improve presentation or marketability, but it does not automatically increase monetary value - and treatment costs are not necessarily recovered.
Common condition issues that can be addressed in conservation treatment:
Painting
Varnish removal:
Before After
Heavy surface dirt accumulated on peaks of impasto:
Before After
Tear repair and integration of losses:
Before After
Objects
Chips and losses in ceramic surface that can be filled and inpainted:
Before After
Reassembly of a glass object:
Before After
Patina loss and abrasion in bronze:
Before After
Losses to gilding surface:
Before After
Paper
Discoloration and staining of paper:
Before After
Tear repair and adhesive removal
Before After
How an appraiser approaches condition and value
An appraiser considers condition alongside other factors, including:
Authenticity and attribution
Provenance and history
Rarity, quality, size, and subject matter
Artist reputation and market demand
Comparable market transactions and the relevant value premise
An appraisal of an artwork in its current condition should not assume that recommended treatment has already occurred. The appraiser does not prescribe conservation treatment or promise a financial return from it. If treatment is being considered, the appraiser can help clarify the artwork’s current market position while the conservator assesses the condition, options, risks, and estimated costs.
Know which value you need
An artwork does not have one universal monetary value. The conclusion depends on the appraisal’s purpose, the applicable definition of value, the relevant market, and the effective date.
Fair market value (FMV): commonly used for estate tax, divorce and charitable contribution appraisals or collateral.
Replacement Value: commonly used for insurance coverage; the cost of replacing an item with one of like kind and quality in the relevant market.
These value premises are not interchangeable. An appraisal prepared for one purpose may not answer the question posed by another.
Conservation: care, ethics, and prevention
Conservation is not simply about making an object look new. It is about preserving the object while respecting its artistic integrity, materials, and history. Not every crack, discoloration, loss, or sign of age requires treatment; some changes are stable or inherent to the materials.
Minimal intervention: treat only when there is a sound reason to do so.
Documentation: record condition and treatment so future caretakers understand what was done.
Material compatibility: choose appropriate materials and methods for the object.
Future treatment: reversibility or safe re-treatment is an important consideration, although not every treatment can be completely reversed.
Prevention: suitable lighting, stable environmental conditions, safe handling, appropriate storage, and periodic condition checks can reduce the need for invasive treatment.
Repairing an existing problem is different from preventing one. Sometimes the most effective conservation strategy is a change in storage, display, or handling—not physical treatment.
Case Study:
Wilson Irvine, In Early Autumn, 1912
A careful conservation treatment helped reveal qualities that had been obscured by thick, discolored varnish and previous overpaint. The process was adjusted to address different surface conditions and included:
Overall dry cleaning, followed by aqueous cleaning and varnish removal using solvents and solvent gels
Addressing areas of previous overpaint as the varnish was removed
Filling losses and inpainting small areas where necessary
Applying a final conservation-grade varnish
Cleaning and making minor repairs to the original frame
With the obscuring varnish removed and the surface stabilized, Irvine’s nuanced palette, luminous effects, and atmospheric qualities became more apparent.
What this means for value. From an appraisal perspective, improved presentation can help collectors and prospective buyers better appreciate an artwork’s qualities. The impact on monetary value, however, depends on the work, the treatment, and the relevant market; a visual transformation does not guarantee a corresponding increase in value.
During varnish removal: Wilson Irvine, In Early Autumn, 1912, oil on canvas
After varnish removal: The painting’s original color relationships and luminous qualities become more apparent following treatment.
When Restoration goes too far
Over-restoration can compromise an artwork’s integrity and may affect how it is regarded in the market. Potential concerns include:
Excessive cleaning that alters original surfaces or removes important material
Overpainting or inpainting that extends beyond what is needed to reintegrate losses
Replacing original components unnecessarilyTreatment that makes an object look newer but diminishes evidence of its history
A qualified conservator weighs the benefits and risks of treatment and documents the work. Owners should understand the proposed approach before authorizing significant intervention.
Who should you call – and when?
Contact an appraiser when you need to:
Establish current values for insurance coverage or a scheduled collection
Determine FMV for estate planning, estate tax, charitable contribution, or another applicable purpose
Understand financial considerations when selling, donating, or dividing a collection
Review whether existing valuations remain appropriate as markets change
Obtain an independent opinion when condition, attribution, provenance, or marketability raises questions
Contact a conservator when you need to:
Assess damage, deterioration, or structural instability
Understand previous restoration or determine whether treatment is appropriate
Evaluate treatment options, risks, feasibility, and estimated cost
Prepare an artwork for safe transport, display, storage, or a museum loan
Develop a preventive-care plan or obtain a condition report
Consult both when:
Significant damage or previous restoration may affect value
You are considering conservation before a sale
An estate, donation, or insurance matter involves substantial condition concerns
You need to weigh potential treatment benefits against cost
Sentimental value vs. monetary value: when an object means everything
A client once brought a conservator a small keepsake from her grandmother: laminated cardboard and thin paper bearing the handwritten message, “To Laura, I love you, Granny.” The family dog had chewed it into pieces, which arrived at the conservation studio in a plastic bag.
The token may have had little monetary value, but its personal meaning was immeasurable. For the conservator, the work was about preserving a tangible connection to a cherished family relationship—not simply repairing damaged material.
The distinction: An appraiser can assess monetary value using factors such as maker, provenance, rarity, condition, and comparable sales. Sentimental value is personal and cannot be reliably measured in dollars. Neither diminishes the other: an object with little resale value may still be one of a family’s most precious possessions.
Common Collection Care Mistakes
Even well-intentioned decisions can put artworks and collections at risk.
From a conservator's perspective:
Cleaning or repairing artwork with household products or untested methods
Underestimating the cumulative effects of light, humidity fluctuations, poor storage, and improper handling
Overcleaning gilded frames or delicate surfaces
Moving or packing fragile works without assessing stability and support needs
From an appraiser's perspective:
Treating purchase price, insurance Replacement Value, and FMV as interchangeable
Relying on outdated appraisals without checking whether the values and purpose remain appropriate
Assuming an insurance schedule automatically reflects current holdings, descriptions, and replacement values
Paying for treatment before considering the artwork’s current market position and the likely costs and benefits
Your annual collection-care checkup
Review your inventory and insurance coverage; confirm descriptions and photographs are accurate.
Check appraisal dates and confirm that each valuation addresses the appropriate purpose.
Update photographs and condition records after a move, treatment, or noticeable change.Look for new cracks, lifting paint, tears, stains, corrosion, or structural changes.
Review display and storage conditions, including sunlight, heat, moisture, and environmental fluctuations.Avoid untested cleaning methods, especially on delicate surfaces, works on paper, and gilded frames.
Consult a qualified conservator when professional cleaning, maintenance, or treatment may be needed.
The goal is not to intervene unnecessarily. It is to understand a collection’s condition and respond thoughtfully before small issues become more serious.
Questions collectors often ask
What condition issue is often overlooked?
Appraisers often see owners relying on outdated values or assuming an insurance schedule reflects current holdings. Conservators emphasize the cumulative effects of environmental conditions, previous restoration, and improper handling. Regular reviews can help prevent misunderstandings and identify developing problems.
Should you conserve an artwork before having it appraised?
Not necessarily. If the goal is to appraise the work in its current condition, treatment beforehand may be unnecessary and could obscure its pre-treatment state. If the work is unstable or condition concerns may affect a sale or other decision, consult a conservator. Documenting condition before treatment is especially useful.
Can conservation increase an artwork’s value?
Treatment can improve presentation and may support marketability, but an increase in monetary value is not guaranteed. Results depend on the artwork, condition issue, treatment, and relevant market; treatment costs are not automatically recovered.
A collaborative approach to caring for collections
Conservation and appraisal serve different purposes, but both help owners understand and care for the objects entrusted to them. A conservator evaluates physical condition and preservation options; an appraiser evaluates monetary value in the context of the relevant market and purpose. Together, they can help owners make informed decisions that respect an artwork’s integrity and support its long-term care.
