> Source: https://www.openingbid.art/artist/thomas-a-dedecker · updated 2026-11-02

# Thomas A. DeDecker (b. 1951)

Thomas A. DeDecker is an American artist with 13 auction lots recorded since 2010, median price $640. Some sold prices are hammer-only and exclude the buyer's premium; they are marked on this page. Some sold prices are not yet verified as premium-inclusive or hammer, and are marked on this page.

A work by Thomas A. DeDecker sold in 2025 for $1,270, according to OpeningBid's index of auction results.

**1 Thomas A. DeDecker work is coming to auction** (as of 2026-11-02).

- [Thomas A. DeDecker on OpeningBid](https://www.openingbid.art/artist/thomas-a-dedecker?ref=kg:thomas-a-dedecker) — follow free in the OpeningBid app for sale alerts.

## What is a Thomas A. DeDecker work worth?

Across 11 sold lots tracked by OpeningBid, the median price of a Thomas A. DeDecker work is $640.

The median Thomas A. DeDecker painting sells for $650 across 11 lots.

Prices are premium-inclusive where the house records them; hammer-only prices exclude the buyer's premium, and some prices are not yet basis-verified.

## Price breakdown by category

| Category | Lots tracked | Median price | Record price | Sell-through | Last sale |
|---|---|---|---|---|---|
| Paintings | 13 | $650†‡ | $3,250 | 84.6% | 2025-03-25 |

† hammer price — buyer's premium not included.

‡ reported price — whether it includes the buyer's premium is not yet verified.

## Price by size

### Paintings

| Size | Sold lots | Typical range (p25–p75) | Median | Record |
|---|---|---|---|---|
| small (under 50 cm) | 5 | $618–$640†‡ | $640†‡ | $650† |
| medium (50–120 cm) | 6 | $1,628–$3,044‡ | $2,751‡ | $3,250 |

† hammer price — buyer's premium not included.

‡ reported price — whether it includes the buyer's premium is not yet verified.

Size is the work's longest edge. Cells appear only with at least 5 sold lots.

## Notable results

| Medium | Year | Price |
|---|---|---|
| Paintings | 2023 | $3,250 |
| Paintings | 2023 | $3,125 |

The highest recorded result in each medium. The full sale history is in the OpeningBid app (free sign-up).

## Frequently asked questions

### What is a Thomas A. DeDecker worth?

Across 11 sold lots tracked by OpeningBid, the median price of a Thomas A. DeDecker work is $640. The median Thomas A. DeDecker painting sells for $650 across 11 lots. Prices are premium-inclusive where the house records them; hammer-only prices exclude the buyer's premium, and some prices are not yet basis-verified.

### What is the average price of a Thomas A. DeDecker painting?

Based on 11 sold lots tracked by OpeningBid, the median auction price of a Thomas A. DeDecker painting is $650. Prices are premium-inclusive where the house records them; hammer-only prices exclude the buyer's premium, and some prices are not yet basis-verified.

### What is Thomas A. DeDecker's most expensive painting?

The highest price recorded at auction for a Thomas A. DeDecker painting is $3,250.

### What is Thomas A. DeDecker's auction record?

Thomas A. DeDecker's auction record is $2,800, set in 2023.

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Data last updated 2026-11-02. OpeningBid tracks 15,390,829 auction lots from 577 auction houses, refreshed nightly.

Cite this page as: OpeningBid, “Thomas A. DeDecker auction prices”, https://www.openingbid.art/artist/thomas-a-dedecker (updated 2026-11-02).

Historical auction data, not investment advice. Prices are premium-inclusive USD where the buyer's premium is recorded. Figures marked † are hammer prices (buyer's premium not included); ‡ marks a price whose basis is not yet verified. Non-USD results are converted at the sale month's rate.