Sotheby S Antique Appraisals: appraisal and value basics
Sotheby S Antique Appraisals research should start with identification, condition, provenance, and recent comparable sales. Use this guide to compare the signals that matter before paying for a formal appraisal or deciding whether to sell.
When people look for an antique appraisal from an auction house, they’re usually trying to answer one of three questions: Should I consign this? What is it worth for insurance/estate? or Is it authentic?
This guide explains what “appraisal” means in an auction-house context, what to photograph and document for a specialist review, and how to benchmark a value range using public auction comps.
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Auction estimate vs formal appraisal: the difference that matters
Auction houses are built to sell objects, so much of what people call “appraisal” online is really an auction estimate: a specialist’s price range for what an item could achieve in the right sale, at a specific time.
A written appraisal is different. It defines a value type (insurance replacement, fair market value, etc.), states an effective date, and usually includes enough documentation to stand up for an insurer, estate, or tax file.
- Estimate (auction): a sale-focused range; can change with season, sale placement, and category demand.
- Fair market value: commonly used for taxes/estate; reflects realistic market transactions.
- Replacement value: commonly used for insurance; often higher because it assumes retail replacement.
What to submit for an antique assessment
Whether you’re contacting an auction house, an independent appraiser, or an online specialist, the fastest path to a reliable answer is the same: provide identification photos + measurement + condition evidence.
- Overall shots: front/back/sides plus a photo that shows scale.
- Measurements: height/width/depth; include any extensions/leaves.
- Marks: maker’s marks, hallmarks, backstamps, labels, serial numbers, inscriptions.
- Construction: joints, hardware, underside/base, back panels, drawer bottoms, tool marks.
- Condition: chips, cracks, repairs, refinishing, replaced parts, missing components.
- Provenance: receipts, prior appraisals, family notes, export papers (photos/PDFs help).
What specialists look at first (and why small details move big money)
Two antiques can look “the same” in a room photo and still be worlds apart in value. Specialists typically start by answering: Does the construction match the claimed period? and Is the condition honest?
Photo gallery: details that change value
These close-ups are examples of the kinds of details specialists and independent appraisers use to authenticate, date, and grade an object.
If you’re deciding between “consign to a major house” and “sell locally,” don’t anchor on a single number. Build a range with a simple workflow:
- Match the object type: correct category, period, materials, size, and maker/attribution.
- Adjust for condition: cracks, restorations, replacements, refinishing, missing parts.
- Account for venue: marketing and buyer pool can lift prices, but fees and timing matter too.
- Separate hammer vs net: hammer price is not what a consignor takes home after seller’s commission.
When an auction house is the right next step (and when it’s not)
- Best for: high-value or rare objects where global bidding and specialist marketing matter.
- Not ideal for: common antiques where fees/shipping/lead time overwhelm the upside.
- Insurance/estate files: often require a written appraisal with defined value type and effective date.
- Authentication disputes: may require in-person examination and sometimes third-party testing.
Photo checklist for an appraisal-ready submission
If you want the fastest, most reliable response from any specialist, photograph:
- Full object (front/back/sides) + one photo showing scale.
- Close-ups of marks: hallmarks, backstamps, labels, signatures, inscriptions.
- Construction details: joints, underside/base, hardware, fasteners, back panels.
- Condition evidence in raking light: chips, cracks, veneer losses, repairs, refinishing.
- A simple measurement note (or a photo of a tape measure beside the item).
Avoid heavy cleaning before you document—patina and faint marks can be evidence.
2026 appraisal checklist update
We refreshed this guide with a tighter valuation workflow so readers can move from rough estimates to defensible numbers faster. Start by defining the appraisal purpose (insurance replacement, fair market value, estate reporting, or pre-sale pricing), because each purpose can change the final range and supporting evidence requirements.
Before requesting opinions, prepare a clean evidence pack: overall photos, detail photos, dimensions, material notes, signatures/marks, condition issues, and provenance records (receipts, family history, prior appraisals). Then compare at least three recent sold comps with similar maker, period, condition, and size. If comps vary widely, note why (restoration, attribution confidence, venue quality, buyer demand).
If you need local in-person support, compare experts in the Art Appraisers Directory and Antique Appraisers Directory. For faster remote turnaround, you can start an online appraisal with Appraisily.
Search variations collectors ask
Readers often search for these appraisal questions:
- how to prepare antiques for auction consignment
Each question is addressed above (value type, submission checklist, comps, and next steps).
References
- The Appraisal Foundation (USPAP context)
- IRS Publication 561 (Donated property valuation)
- Smithsonian Museum Conservation Institute: Taking care of collections
Wrap-up
The most important step happens before you submit an antique anywhere: decide whether you need a sale estimate or a formal appraisal, then document the object with the photos and measurements that let specialists compare it accurately.