Topic: Meio Ambiente

Coming to Terms with Density: An Urban Planning Concept in the Spotlight 

September 15, 2025

By Anthony Flint, September 15, 2025
 

It’s an urban planning concept that sounds extra wonky, but it is critical in any discussion of affordable housing, land use, and real estate development: density.

In this episode of the Land Matters podcast, two practitioners in architecture and urban design shed some light on what density is all about, on the ground, in cities and towns trying to add more housing supply. 

The occasion is the revival of a Lincoln Institute resource called Visualizing Density, which was pushed live this month at lincolninst.edu after extensive renovations and updates. It’s a visual guide to density based on a library of aerial images of buildings, blocks, and neighborhoods taken by photographer Alex Maclean, originally published (and still available) as a book by Julie Campoli. 

It’s a very timely clearinghouse, as communities across the country work to address affordable housing, primarily by reforming zoning and land use regulations to allow more multifamily housing development—generally less pricey than the detached single-family homes that have dominated the landscape. 

Residential density is understood to be the number of homes within a defined area of land, in the US most often expressed as dwelling units per acre. A typical suburban single-family subdivision might be just two units per acre; a more urban neighborhood, like Boston’s Back Bay, has a density of about 60 units per acre. 

Demographic trends suggest that future homeowners and renters will prefer greater density in the form of multifamily housing and mixed-use development, said David Dixon, a vice president at Stantec, a global professional services firm providing sustainable engineering, architecture, and environmental consulting services. Over the next 20 years, the vast majority of households will continue to be professionals without kids, he said, and will not be interested in big detached single-family homes.  

Instead they seek “places to walk to, places to find amenity, places to run into friends, places to enjoy community,” he said. “The number one correlation that you find for folks under the age of 35, which is when most of us move for a job, is not wanting to be auto-dependent. They are flocking to the same mixed-use, walkable, higher-density, amenitized, community-rich places that the housing market wants to build … Demand and imperative have come together. It’s a perfect storm to support density going forward.” 

Tensions often arise, however, when new, higher density is proposed for existing neighborhoods, on vacant lots or other redevelopment sites. Tim Love, principal and founder of the architecture firm Utile, and a professor at Harvard University’s Graduate School of Design, said he’s seen the wariness from established residents as he helps cities and towns comply with the MBTA Communities Act, a Massachusetts state law that requires districts near transit stations with an allowable density of 15 units per acre. 

Some towns have rebelled against the law, which is one of several state zoning reform initiatives across the US designed to increase housing supply, ultimately to help bring prices down. 

Many neighbors are skeptical because they associate multifamily density with large apartment buildings of 100 or 200 units, Love said. But most don’t realize there is an array of so-called “gentle density” development opportunities for buildings of 12 to 20 units, that have the potential to blend in more seamlessly with many streetscapes. 

“If we look at the logic of the real estate market, discovering over the last 15, 20 years that the corridor-accessed apartment building at 120 and 200 units-plus optimizes the building code to maximize returns, there is a smaller ‘missing middle’ type that I’ve become maybe a little bit obsessed about, which is the 12-unit single-stair building,” said Love, who conducted a geospatial analysis that revealed 5,000 sites in the Boston area that were perfect for a 12-unit building. 

“Five thousand times twelve is a lot of housing,” Love said. “If we came up with 5,000 sites within walking distance of a transit stop, that’s a pretty good story to get out and a good place to start.” 

Another dilemma of density is that while big increases in multifamily housing supply theoretically should have a downward impact on prices, many individual dense development projects in hot housing markets are often quite expensive. Dixon, who is currently writing a book about density and Main Streets, said the way to combat gentrification associated with density is to require a portion of units to be affordable, and to capture increases in the value of urban land to create more affordability. 

“If we have policies in place so that value doesn’t all go to the [owners of the] underlying land and we can tap those premiums, that is a way to finance affordable housing,” he said. “In other words, when we use density to create places that are more valuable because they can be walkable, mixed-use, lively, community-rich, amenitized, all these good things, we … owe it to ourselves to tap some of that value to create affordability so that everybody can live there.” 

Visualizing Density can be found at the Lincoln Institute website at https://www.lincolninst.edu/data/visualizing-density/. 

Listen to the show here or subscribe to Land Matters on  Apple Podcasts, Spotify,  Stitcher, YouTube, or wherever you listen to podcasts.

 


Further reading 

Visualizing Density | Lincoln Institute

What Does 15 Units Per Acre Look Like? A StoryMap Exploring Street-Level Density | Land Lines

Why We Need Walkable Density for Cities to Thrive | Public Square

The Density Conundrum: Bringing the 15-Minute City to Texas | Urban Land

The Density Dilemma: Appeal and Obstacles for Compact and Transit Oriented Development | Anthony Flint

 


Anthony Flint is a senior fellow at the Lincoln Institute of Land Policy, host of the Land Matters podcast, and a contributing editor of Land Lines. 

Lincoln Institute of Land Policy and Land Trust Alliance Present Hudson Valley’s Steve Rosenberg with Kingsbury Browne Distinguished Practitioner Award

By Corey Himrod, Setembro 8, 2025

CLEVELAND, OH – The Lincoln Institute of Land Policy and the Land Trust Alliance are pleased to announce that Steve Rosenberg has been presented with the 2025 Kingsbury Browne Distinguished Practitioner Award at the Alliance’s annual national land conservation conference, held this year in Cleveland, Ohio.

The Kingsbury Browne Distinguished Practitioner award—named for Kingsbury Browne, a lawyer and conservationist who was a Lincoln Institute Fellow in 1980 and inspired the Alliance’s founding in 1982—is presented annually and honors those who have enriched the conservation community through their outstanding leadership, innovation, and creativity in land conservation. Rosenberg will serve as the Kingsbury Browne distinguished practitioner for the Lincoln Institute in Cambridge, Massachusetts, for 2025–2026.

Rosenberg is currently the co-convener of the Hudson Valley Alliance for Housing and Conservation, which brings together organizations to strengthen biodiversity and climate resilience in New York’s Hudson Valley while creating affordable places where people can live. His work there follows more than three decades as the senior vice president of Scenic Hudson and the executive director of the Scenic Hudson Land Trust, where he led many efforts bringing land, equity, and conservation together at the regional scale, including authoring the NYC/Hudson Valley Foodshed Conservation Plan, launching Scenic Hudson’s River Cities Program, and transforming postindustrial Hudson River waterfronts into inviting public places. Rosenberg served on the board of the Land Trust Alliance for nine years.

“Steve has been a driving force in putting conservation to work for communities—safeguarding local food systems, expanding land access, and advancing economic opportunity,” said Chandni Navalkha, director of conservation and stewardship at the Lincoln Institute. “His leadership in uniting the land conservation and affordable housing sectors in the Hudson Valley sets a powerful example for collaborative solutions that benefit people and places, nationwide and beyond.”

“I have witnessed firsthand Steve’s passion and tireless dedication to land conservation and the mutually reinforcing benefits to people and communities,” said Ashley Demosthenes, CEO of the Land Trust Alliance. “The acreage protected and parks that were created during his tenure at Scenic Hudson are tremendous assets for communities and the entire Hudson Valley. And his bringing together of the affordable housing community and the land preservation community has made it possible to address critical community issues in new and collaborative ways. It is my honor to recognize Steve Rosenberg as the recipient of the 2025 Kingsbury Brown Distinguished Practitioner award.”

About the Land Trust Alliance

Founded in 1982, the Land Trust Alliance is a national land conservation organization working to save the places people need and love by empowering and mobilizing land trusts in communities across America to conserve land for the benefit of all. The Alliance represents approximately 1,000 member land trusts and affiliates supported by more than 250,000 volunteers and 6.3 million members nationwide. The Alliance is based in Washington DC, with staff in communities across the United States.

About the Lincoln Institute of Land Policy 

The Lincoln Institute of Land Policy seeks to improve quality of life through the effective use, taxation, and stewardship of land. A nonprofit private operating foundation whose origins date to 1946, the Lincoln Institute researches and recommends creative approaches to land as a solution to economic, social, and environmental challenges. Through education, training, publications and events, we integrate theory and practice to inform public policy decisions worldwide.

Lead image: Steve Rosenberg (center) accepts the Kingsbury Browne award alongside Land Trust Alliance CEO Ashley Demosthenes (right) and board chair David Calle (left). Credit: DJ Glisson II/Firefly Imageworks.

Fellows in Focus

Protecting Puerto Rico’s Biodiversity

By Jon Gorey, Setembro 1, 2025

The Lincoln Institute provides a variety of early- and mid-career fellowship opportunities for researchers. In this series, we follow up with our fellows to learn more about their work.

Fernando Lloveras San Miguel has served as executive director of the Conservation Trust of Puerto Rico for more than two decades, and as president of its Para La Naturaleza unit since its founding in 2013. With degrees in economics and geography from Dartmouth College, public policy from Harvard University, and law from the University of Puerto Rico, Lloveras knows his way around both natural and legal landscapes. 

In 2020, Lloveras received the Kingsbury Browne Conservation Leadership Award and Fellowship, named for the Boston lawyer and former Lincoln Institute fellow whose work led to the creation of the Land Trust Alliance. (The award is now known as the Kingsbury Browne Distinguished Practitioner program.) In this interview, which has been edited for length and clarity, Lloveras discusses what it will take to conserve 33 percent of Puerto Rico by 2033, the unique conservation finance strategies Para La Naturaleza is using to achieve that goal, and the movement to recognize the inherent rights of nature.

JON GOREY: What is the focus of your work?

FERNANDO LLOVERAS SAN MIGUEL: Our work has been centered on providing the islands of Puerto Rico with the biodiversity and life systems that are needed to live a sustainable life. We set a goal in 2016 to protect 33 percent of the islands by 2033, so that’s our overarching goal: having Puerto Rico as a living organism and providing healthy and sustainable ecosystems for everybody.

We set this goal, and the year after we got Hurricane Maria, which was a Category 5 hurricane that devastated the whole island. And then we had a lot of issues with our funding source, and we’ve had a lot of pro-development policies going on. So there’s been a huge amount of challenges that we have faced, and are facing. But in general, I think we have been able to overcome some of those. We recently secured more funding that will allow us to do more long-term planning and long-term acquisitions, and land protection and biodiversity protection. So we have been able to navigate in very rough waters, and I think we’re in good shape, even though the challenges keep increasing every day.

JG: What are you working on now, and what are you hoping to work on next?

FL: Last year we worked really hard to do a new strategic plan, so we just finished and adopted that late last year. One of the challenges we were able to overcome was around conservation easements. [In Puerto Rico] we have a cap on the amount of tax credits that are available, and we used to have up to $15 million a year, but then it went down to $3 million. We got it back to $15 million, so we got that win in the legislature here, and now we have capacity to do more conservation easements.

In terms of land acquisitions, we have a lot in the pipeline. We have a lot of properties that are in the due diligence process, doing inventories and measurements. We do a very sophisticated biodiversity documentation, using a land conservation matrix, to see which ones are more critical for conservation.

The coastal areas are the most high-risk areas, and they’re also the most expensive areas. So that’s been a big challenge, because Puerto Rico has been developed a lot around the coastal areas. We have disconnected a lot of the ocean and coastal marine areas from the mountains and rivers. So we need to create more corridors as part of our Map 33 plan. We have two, maybe three, very important coastal areas that are critical, but are extremely expensive, so we’re juggling to see how we can get those protected.

An aerial image of the Culebrita lighthouse in Puerto Rico, a brick structure with curving green coastland and blue ocean waters in the background,.
Para la Naturaleza is working to transform the Culebrita lighthouse, built in the late 1800s, into a visitor and research center dedicated to conservation. Credit: Para la Naturaleza.

JG: Are there any legal or cultural differences that affect how land is used or conserved in Puerto Rico versus the mainland United States?

FL: We have adopted a lot of the urban sprawl mentality, to have suburbs, to have shopping malls everywhere. We have adopted a lot of US commercial development patterns in a very small place. We’re only 100 miles by 35 miles, and we have 3 million people living here, so the population density is very high, which creates a higher cost of land. And then sprawl happens because we haven’t had a good land use planning system. The sprawl and the construction creates a lot of disconnection between ecosystems.

We also have some special arrangements with the Puerto Rico government that I don’t know if other NGOs in the States can have. We are authorized by the Puerto Rico Treasury to issue tax-free bonds to finance conservation. So we’re very unique, because Puerto Rico is not within the tax jurisdiction of the US, so the Treasury Department in Puerto Rico tends to have more leeway.

JG: Are there other innovative conservation finance strategies you’re pursuing?

FL: We are a very complex and unique organization in terms of financing. We have been able to create an endowment, and that’s been a game changer for us. Our endowment covers pretty much 70 percent of our operational costs, so that gives us a lot of stability. I usually recommend that organizations start looking into how to support at least a core, basic operational cost on a more sustainable basis, like an endowment, because I know the struggle that a lot of NGOs go through, making the payrolls every month. That’s a stress that just wears down anybody. So that’s something that we have been building for the past 30 to 40 years.

Since Puerto Rico has a lot of low-income communities, we qualify for what’s called a new market tax credit, which is a tax credit created to incentivize investment in low-income areas. So we’ve been using that mechanism. We’re also doing a mitigation bank, which is about to get started, and that is expected to provide some revenue.

JG: What’s one thing you wish more people understood about land conservation and natural ecosystems?

FL: We have a whole unit called the ecological culture unit, which is really restoring not only the awareness, but the understanding, that we are part of a natural ecosystem, and that we need to coexist with other species.

We do things automatically, just because the economic numbers work out, but we’re forgetting the whole functioning and life systems of the island. So we’re doing a lot of educational work, a lot of communication work with students. We have summer camps, we have different types of programs to get people to understand that their decisions are important.

Several citizen scientists participate in a Conservation Trust of Puerto Rico project in a wooded area. In the foreground, a woman with a backpack and light blue, long-sleeved shirt faces away from the camera and points out a feature to the other people.
Citizen scientists participate in Para la Naturaleza’s Map of Life initiative. Credit: Para la Naturaleza.

JG: Is there anything surprising or unexpected that you’ve encountered in your work?

Not totally unexpected, but hurricanes—I mean both climatic hurricanes and political hurricanes. We have been living through great changes in terms of the importance of nature. So that’s kind of the big changes that were not expected on the negative side. On the positive side, as I say, we have been able to secure some stability into the future.

JG: When it comes to your work, what keeps you up at night? And what gives you hope?

FL: We have the opportunity to achieve [our 33 percent by 2033 goal], but we need to change a lot of the development mentality that is still very strong. I mean, they’re talking about doing a huge 2,000-acre complex with five hotels. That’s kind of the nightmare at night, having all these mega-projects which are not at all sensitive to the environment, destroying 2,000 acres of land. It’s just a huge impact to our island. That’s the biggest thing, just to make sure that we can move our development mindset toward a sustainable economic framework instead of the total destruction framework that we have right now.

JG: What have you been reading lately?

FL: One of our objectives now is to have nature’s inherent rights recognized. So we’re working with this movement, sprung out of Indigenous communities, of having nature have its own rights—so not only laws to protect endangered species and so forth, but laws that give nature legal personality to be able to sue and protect itself. It’s a different approach to legal protection, having nature be recognized as a living organism, able to have legal rights. We’re going to have a panel discussion on this issue at Climate Week in New York next month. The Global Alliance for the Rights of Nature website, GARN.org, has a lot of good information, every single country in the world that has adopted rights of nature laws or regulations. Even in the US, there are quite a few examples of Indian tribes and other states that have provided some rights of nature.


Jon Gorey is a staff writer at the Lincoln Institute of Land Policy.

Lead image: Fernando Lloveras San Miguel, executive director of the Conservation Trust of Puerto Rico and former Kingsbury Browne fellow at the Lincoln Institute. Credit: Courtesy photo.

Oportunidades de bolsas para estudantes graduados

2025–2026 Programa de becas para el máster UNED-Instituto Lincoln

Prazo para submissão: October 10, 2025 at 11:59 PM

El Instituto Lincoln de Políticas de Suelo y la Universidad Nacional de Educación a Distancia (UNED) ofrecen el máster en Políticas de Suelo y Desarrollo Urbano Sostenible, un programa académico online en español que reúne de manera única los marcos legales y herramientas que sostienen la planificación urbana, junto con instrumentos fiscales, ambientales y de participación, desde una perspectiva internacional y comparada.

El máster está dirigido especialmente a estudiantes de posgrado y otros graduados con interés en políticas urbanas desde una perspectiva jurídica, ambiental y de procesos de participación, así como a funcionarios públicos. Los participantes del programa recibirán el entrenamiento teórico y técnico para liderar la implementación de medidas que permitan la transformación sostenible de las ciudades.

Plazo de matrícula ordinario: del 8 de septiembre al 28 de noviembre de 2025

El inicio del máster es en enero de 2026.  La fecha exacta se anunciará antes del 28 de noviembre de 2025.

El Instituto Lincoln otorgará becas que cubrirán parcialmente el costo del máster de los postulantes seleccionados.

Términos de las becas: 

  • Los becarios deben haber obtenido un título de licenciatura de una institución académica o de estudios superiores. 
  • Los fondos de las becas no tienen valor en efectivo y solo cubrirán el 40 % del costo total del programa. 
  • Los becarios deben pagar la primera cuota de la matrícula, que representa el 60 % del costo total del máster. 
  • Los becarios deben mantener una buena posición académica o perderán el beneficio. 

El otorgamiento de la beca dependerá de la admisión formal del postulante al máster UNED-Instituto Lincoln. 

Si son seleccionados, los becarios recibirán asistencia virtual para realizar el proceso de admisión de la Universidad Nacional de Educación a Distancia (UNED), el cual requiere una solicitud online y una copia del expediente académico o registro de calificaciones de licenciatura y/o posgrado. 

Aquellos postulantes que no obtengan la beca parcial del Instituto Lincoln podrán optar a las ayudas que ofrece la UNED, una vez que se hayan matriculado en el máster. 

Fecha límite para postular: 10 de octubre de 2025, 23:59 horas de Boston, MA, EUA (UTC-5) 

Anuncio de resultados: 22 de octubre 2025 


Detalhes

Prazo para submissão
October 10, 2025 at 11:59 PM

Palavras-chave

Mitigação Climática, Desenvolvimento, Resolução de Conflitos, Gestão Ambiental, zoneamento excludente, Favela, Henry George, Mercados Fundiários Informais, Infraestrutura, Regulação dos Mercados Fundiários, Especulação Fundiário, Uso do Solo, Planejamento de Uso do Solo, Valor da Terra, Tributação Imobiliária, Tributação Base Solo, Governo Local, Mediação, Saúde Fiscal Municipal, Planejamento, Tributação Imobiliária, Finanças Públicas, Políticas Públicas, Regimes Regulatórios, Resiliência, Reutilização do Solo Urbano, Desenvolvimento Urbano, Urbanismo, Recuperação de Mais-Valias