Impact by Design

What Wins Architecture’s Top Prize, and What Does the Most Good

Studio Viridian ranked 29 investments across its six themes by the good they do per dollar, then set them against what the Pritzker jury has honored since 2010. The two line up in three places, and some of the best work is the kind no jury will ever see.

The Pritzker Architecture Prize goes to a living architect for a body of built work, usually after decades of it; by one informal tally, laureates have averaged about 63 years old. Its medal carries three words from Vitruvius: firmness, commodity and delight. The first two are assumed in every laureate. The third is the one juries argue about.

Studio Viridian aims to win it one day on the strength of its impact. Its working paper Impact by Design asks which investments return the most good per dollar, and where the firm’s six strategic themes (Circularity, Nature, AEC Innovation, Beauty, People and Net-Zero Architecture) overlap with what the jury actually honors. The prize is kept out of the score, so the projects that photograph well can’t crowd out the quiet ones that do the most good.

29 investments, by the good they do and by how much a Pritzker jury would notice

Each circle is one investment. Higher circles return more impact per dollar; circles farther right match work the jury has honored more directly.

The spine of a Pritzker-worthy body of workQuiet work no jury will seeOther investments

Ratings are the paper’s judgments, drawn from published evidence. Design excellence (16) is “indirect” because its return arrives through every other investment. Hover or tap a circle for its details. Source: Impact by Design, § 04.

The top row holds both kinds of work. Keeping a house and adding homes to its lot is very high impact, and it is close to what Lacaton & Vassal were honored for. Family-sized homes for voucher families in high-opportunity neighborhoods rank first of all. Healthy homes for young children score just as high, and no jury will ever cite them.

What the jury honors

Since 2010 the jury has returned again and again to nine drivers. It has honored social purpose often, in Shigeru Ban, Alejandro Aravena, Balkrishna Doshi, Lacaton & Vassal, Francis Kéré, Riken Yamamoto and Liu Jiakun. But it has never stopped honoring material and poetic work without a social program. The 2026 laureate, Smiljan Radić, was honored for material experimentation and cultural memory, not for social metrics.

What the jury has honored since 2010

Number of the 17 awards from 2010 to 2026 that turn on each driver

The paper’s coding of the jury citations and each laureate’s best-known work; two readers would code a few awards differently. Source: Impact by Design, Figure 1.

The laureates closest to Studio Viridian’s work transformed rather than demolished. Lacaton & Vassal remade 530 occupied apartments at Grand Parc in Bordeaux for about a third of the cost of rebuilding, with residents in place and rents unchanged. Aravena built “half a good house” for families in Chile, the half they couldn’t build themselves, and in 2016 gave four of his housing designs away.

Where the themes meet the prize

Set the six themes against the jury’s drivers, add the medal’s firmness and commodity, and rank each overlap by the impact of the investments behind it.

Where the themes meet what the jury honors, ranked by impact

The ten overlaps, the investments that carry each one, and how each rates on impact and on prize weight

Prize weight reflects how often the jury has honored the driver since 2010; firmness and commodity are assumed in every laureate but rarely cited. Source: Impact by Design, § 03.

Three overlaps align impact and the prize: transformation over demolition, dignity for people of modest means and knowledge shared. One is nearly all impact, the sound, safe and healthy homes that juries assume rather than cite. Beauty can’t be ranked per dollar at all. It is the gate: no amount of impact reaches the jury without it.

The quiet work

Some of the strongest returns in the paper come from work that will never be photographed.

Dollars of benefit for each dollar spent

Published estimates for three kinds of repair, on a log scale

The lead estimate rests on 2006 exposure levels; children’s lead levels have fallen since, so today’s return is lower and depends on targeting homes with children under six and failing paint. The CAPABLE savings come from a matched comparison, not a randomized trial. Sources: Gould (2009); CAPABLE; National Institute of Building Sciences (2019).

Home hazard repairs also cut falls by 38 percent among older people selected for high risk, and showed no effect when people weren’t selected. So the paper’s rule is to pair every prize-track project with this work: lead-safe homes for young children, fall-prevention repairs and seismic bracing in everything old.

What the evidence says

Each rating rests on published evidence, graded strong, moderate or thin. Some of the strongest is about people and the places they live.

The paper finds the most room to grow in Nature and AEC Innovation. Keeping the big trees and planting natives, designing for heat and smoke, salmon-safe stormwater, open designs, measured results and paid apprenticeships all cost little and rest on good evidence. Laureates rarely lead with them, which leaves them open ground.

Eight findings behind the ratings

Two of the eight carry caveats in the paper: most of the asthma gain was not statistically significant against a comparison group, and a later review of eight greening studies found a smaller average effect, about 6 percent. Source: Impact by Design, §§ 06–09.

Beauty multiplies

Beauty’s return can’t be counted like the others, because it works through them: loved buildings are kept, copied and published. The evidence that beauty lengthens a building’s life is thin. But places rated more scenic predict better self-reported health beyond the effect of green space, and distinctive buildings raise the value of their neighbors. So the paper funds design excellence inside the high-impact projects rather than beside them, guarded by the firm’s “art of enough.”

Its most practical form is Lacaton & Vassal’s method applied to rentals: spend on volume, light and outdoor rooms instead of costly finishes, and build family-sized homes. Crowded homes are linked to lower school performance and more behavior problems in children.

Twelve ideas that fail

The paper also lists ideas that look like impact, and often feature in sustainable design, but fail once their full effects are counted.

    Source: Impact by Design, § 11.

    Every theme has a place

    The most measurable returns sit with People and Circularity, because health, housing and carbon are what the evidence counts best. Nature and AEC Innovation are close behind and cheaper. Net-Zero’s best returns are its least visible: the heat pump and an honest carbon count, not the array on the roof. Beauty’s return runs through all of them.

    Net-Zero Architecture became a theme of its own on Nov. 3, with three investments drawn from its position memo, The Right Scale. Replacing a gas furnace with a heat pump at the end of its life costs about $7,500 more and avoids about 30 tons of CO2e, about $250 a ton, the benchmark other climate spending has to beat. On Seattle’s nearly carbon-free grid, rooftop solar and annual net-zero accounting achieve little by comparison.

    Each theme’s strongest investments, and where it meets the prize

    Source: Impact by Design, § 12.

    The spine of a body of work

    Together the overlaps suggest one recognizable body of work: Seattle’s missing middle, transformed rather than demolished, set in living landscapes, built with craft, made for families of every income and given away as open designs. Seven investments are its parts, each high-return on its own. Repeated with growing reach, they make one argument, which is what the laureates closest to Viridian have in common.

    The paper’s rule for keeping it honest is to let impact decide the money and the prize decide only the design time. The path is twenty to thirty years of built work, published and juried, carrying named authors and practicing restraint.

    Three levels of commitment

    Each level adds to the one before. Circles are numbered as in the grid above.