Can the new HOAI ensure planning quality?

Building design

the minimum and maximum rates have been abolished. Photo: Daniel McCullough / Unsplash

The Fee Structure for Architects and Engineers (HOAI) changed at the beginning of the year. We have summarized for you here what this means for planners and planning quality.

The Association of German Architects (BDA) disagrees. For the association, the abolition of minimum and maximum rates in the HOAI fundamentally threatens German building culture. The amendment to the HOAI has been in force since 01.01.2021 and is causing uproar among those who see their profession in danger. The BDA is convinced that the federal government has made things too easy for itself. Read about alternative proposals here.

The Fee Structure for Architects and Engineers (HOAI) changed at the beginning of the year. The Bundesrat approved the amendment so that the new law could come into force. The changes mainly affect the minimum and maximum rates of the HOAI. The fees are therefore freely negotiable. The previous price specifications are non-binding. They are for guidance only. You can find the current version of the entire HOAI regulation here.

The reason for the amendment to the HOAI was a ruling by the European Court of Justice (ECJ). In 2019, the ECJ found that the HOAI in its then current version violated the EU Services Directive. According to this directive, the provision of services may not be made dependent on fixed minimum or maximum prices. After the ruling was announced, the Federal Republic of Germany was obliged to implement it swiftly and adapt the national legal system to the requirements of the ECJ ruling.

What does the loss of binding force mean? Can the HOAI remain the basis for calculating fees? Many fear a deterioration in planning quality. The Association of German Architects (BDA), for example, sees numerous disadvantages in abandoning the minimum and maximum rates of the HOAI.

According to a statement by the BDA, this could lead to a drop in prices and the loss of jobs in Germany. As a result, the entire profession could suffer because costs would be cut. This would make it less attractive for young talent. For an industry in which there is already a noticeable shortage of staff and a lack of young talent, this would indeed be fatal.

In addition, there could be strong concentration processes among offices. This means that offices with many employees could prevail, while smaller ones might not survive. The BDA also fears that building culture will suffer if the supply situation deteriorates. The public sector and its own profession would be significantly affected by this. These conceivable scenarios for the BDA are based on the experience of other countries.

As the binding nature of price law is now no longer applicable, the contractual agreement of architectural services will become all the more important. The Committee of Associations and Chambers of Engineers and Architects for the Fee Structure (AHO) points this out. The AHO also emphasizes that the HOAI overall system has proven itself. There is nothing to prevent clients and contractors from continuing to adopt the HOAI fee bases in the future. The AHO strongly advises this in order to prevent price dumping and loss of quality.

Together with the Federal Chamber of Engineers and the Federal Chamber of Architects (BAK), however, the AHO criticizes the lack of an appropriateness clause in the new HOAI. In a press release, Dr.-Ing. Heinrich Bökamp, President of the BAK, states: “We would have liked the regulation to make it clearer that these fees must also be appropriate in the future.”

The BAK is underpinning the fact that planning contracts should continue to be based on the HOAI with a button campaign. The slogan ‘Planning is valuable’ should be passed on by the members. The aim is to raise awareness among architects and clients alike. BAK President Barbara Ettinger-Brinckmann therefore also appeals to architects and planners to stand up for the value of their work so that they are not undercut by service providers from outside the profession.

BDA: Don’t just look at the prices

Back to the BDA statement. It discusses whether the minimum HOAI rates really could not be saved or whether there were other ways of implementing the EU requirements.

A key point for the BDA is the fact that, in principle, architectural services could be provided by anyone. The association is convinced that where no proof of competence is required, there is no protection of the quality of a service. Instead of touching the price specifications, the requirements for service providers could have been formulated more specifically, according to the proposal. The authors cite membership of a chamber as an example of this.

Furthermore, architectural and engineering services could be legally defined. In the statement, this is formulated as follows: “any activity for planning in specific third-party construction matters as soon as these require planning in individual cases.”

In conclusion, the BDA would have liked the ECJ ruling to have been implemented differently. In other words, the focus should not have been on prices, but on maintaining quality. And so it says accordingly: “Abandoning the minimum rates of the HOAI is therefore not absolutely necessary, but represents a legislative decision.” The federal government would not have made use of its creative options.

For this reason, the BDA cannot see how the federal government intends to ensure the quality of construction. Particularly against the backdrop of ecological construction with all its pressing issues or the design of urban space, the authors would have liked to see more ingenuity in the implementation of the ECJ ruling.

Voices from the profession on the ECJ HOAI

In its ruling of July 4, 2019, the European Court of Justice disapproved of the obligation to set minimum and maximum rates as an unjustified competitive disadvantage for foreign market participants. We gathered opinions from the profession at the time. Including Franz Damm, Managing Partner at Keller Damm Kollegen, Dieter Pfrommer, publicly appointed and sworn expert for fees for landscape architecture services, IHK Region Stuttgart and Jens Henningsen, bdla economics spokesperson, Treasurer. Read the opinions on the HOAI 2019 judgment here.

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Large Landscape Gardens: Fundamentals, History, and Significance

Building design
A landscaped garden and park complex designed around the theme of the Grand Landscape Garden
A street with flowers planted along a concrete wall—an example of urban greening. Photo: rumanamin/Unsplash

Anyone who enters a large landscape garden experiences nature as a work of art: vast lawns that gently give way to groups of trees, winding paths that continually draw the eye in new directions, bodies of water that reflect the sky, and sightlines that stretch across hills and valleys. The large landscape garden is one of the most influential inventions in European garden design—a design philosophy that, since the 18th century, has fundamentally redefined the relationship between people, nature, and space, and continues to shape open-space planning to this day.

  • What defines a grand landscape garden and how it differs from other types of gardens
  • How the landscape garden emerged historically and which intellectual movements shaped it
  • Which design principles and design elements underlie the landscape garden
  • What plant selection and vegetation techniques are characteristic of large-scale landscape gardens
  • How care, maintenance, and historic preservation are organized for historic landscapes
  • The significance of the landscape garden for contemporary urban development and open-space planning
  • What common misunderstandings and mistakes occur in planning and maintenance
  • How large-scale landscape gardens are being reevaluated in the context of climate adaptation and biodiversity

Definition and Classification: What Is a Large Landscape Garden?

The large landscape garden, known in English-speaking countries as a “landscape garden” or “English landscape garden,” is a type of open space that deliberately eschews the formal, geometric garden design of the Baroque and Renaissance periods and instead takes an idealized natural landscape as its design basis. It is characterized by meandering paths and shorelines, freely shaped bodies of water, irregularly arranged groups of trees and shrubs, expansive lawns, and a carefully staged sequence of spatial impressions. The word “large” refers not only to the area—which in fact often spans several hundred to over a thousand hectares—but also to the conceptual aspiration: the garden as a reflection of a complete, internally coherent landscape.

The large landscape garden differs fundamentally from the Baroque palace garden in its design logic. While the Baroque garden controls and organizes nature through symmetry, axes, parterres, and topiary (the pruning of trees and shrubs into geometric shapes), the landscape garden simulates the random, the organic, and the picturesque. This simulation, however, is by no means random: It is based on precise design decisions and the deliberate use of topography, vegetation, water, and architecture to create specific moods, visual relationships, and spatial experiences. In this sense, the landscape garden is a highly refined art form that conceals its methods.

Typologically, the large landscape garden can be distinguished from smaller landscape-style home gardens, 19th-century public parks, and modern city parks, even though all these types have emerged from it or been influenced by it. The decisive difference lies in scale and intention: the large landscape garden is a total work of art that reinvents an entire landscape, whereas the 19th-century city park primarily served social and hygienic purposes, and the landscape-style private garden merely borrows formal elements.

Historical Origins: England, the Enlightenment, and Criticism of the Baroque

The roots of the grand landscape garden lie in early 18th-century England, where a combination of philosophical, literary, and political currents gave rise to a new aesthetic of nature. The Enlightenment, with its trust in reason and the observation of nature, stood in productive tension with the contemporary longing for the sublime and the picturesque—that is, for landscapes that evoke awe, vastness, and irregularity. Poets such as Alexander Pope, philosophers such as Anthony Ashley Cooper, the third Earl of Shaftesbury, and painters such as Claude Lorrain and Nicolas Poussin—whose landscape paintings served as direct models—shaped the aesthetic program of the new garden style.

The gardens at Stowe (Buckinghamshire), Stourhead (Wiltshire), and Rousham (Oxfordshire) are considered key early examples. At Stowe, Charles Bridgeman, William Kent, and finally Lancelot “Capability” Brown—who would become the most influential landscape architect of the 18th century—worked in succession. Brown earned his nickname “Capability” from his habit of identifying the “capabilities” of a site for improvement. His style, characterized by meandering lakes, gently undulating lawns, clusters of trees, and belts of trees along the edges, became the epitome of the English landscape garden and influenced hundreds of gardens throughout Great Britain.

At the same time, a theoretical debate developed about the picturesque, led primarily by William Gilpin, Uvedale Price, and Richard Payne Knight. These authors criticized Brown’s style as too smooth and too orderly and called for a rougher, wilder garden aesthetic more closely aligned with painting. This debate is important for understanding the grand landscape garden because it shows that the style was not a uniform doctrine but a dynamic field of aesthetic debate.

The landscape garden style reached Germany in the second half of the 18th century, initially through travelogues and publications, then through direct commissions of English gardeners and the work of local designers such as Friedrich Ludwig von Sckell, who laid out the English Garden in Munich, and Peter Joseph Lenné, who had a decisive influence on the Potsdam park landscape surrounding the New Garden and Sanssouci Park. Prince Franz von Anhalt-Dessau created the Wörlitz Park, the first significant landscape garden project on German soil, which is now a UNESCO World Heritage Site. In these German gardens, the English landscape style is often combined with Enlightenment-era educational programs: temples, inscriptions, monuments, and symbolic structures transform the garden into a walk-through total work of art with a moral and political message.

Design Principles and Design Elements of the Grand Landscape Garden

The grand landscape garden employs a range of design elements that, when combined, create its characteristic spatial experience. The most important element is the staging of visual relationships: the path through the garden is a sequence of images that the designer has deliberately composed. Axial views open up onto temples, bridges, or bodies of water; groups of trees and shrubs frame vistas and block unwanted views; hills and depressions create moments of surprise when, after an ascent, a sweeping view suddenly opens up.

Water plays a central role. Natural or artificially created lakes and ponds with irregular, curved shores are a hallmark of the style. Capability Brown was famous for transforming rivers into expansive lakes through damming, which gave the impression of natural bodies of water. The reflection of the sky and the surrounding vegetation on the water’s surface significantly enhances the sense of depth in the space. Bridges, islands, and shoreline plantings complement the body of water as design elements.

Vegetation is conceived not as individual plants but as mass and volume. Solitary trees—that is, freestanding individual trees with distinctive shapes or sizes—provide focal points within the lawn. Groups of trees and shrubs of varying sizes and compositions structure the space and create a layering of foreground, middle ground, and background reminiscent of landscape painting. Belts of trees and shrubs along the garden’s edges enclose the grounds from the outside and create the impression of a self-contained world. The lawn itself, referred to in the original English as “lawn,” is not merely leftover space but a design element: it connects the groups of trees and shrubs, guides the eye, and gives the garden its sense of expansiveness.

Architectural features—such as temples, grottoes, ruins, bridges, obelisks, and similar structures—complete the picture. They are not functional buildings but rather convey meaning: they allude to ancient models, literary themes, or the client’s worldview. Ruins, whether genuine or artificially created, are a particularly characteristic element because they symbolize transience and the superiority of nature over human creation—a central theme of Enlightenment aesthetics.

Plant Selection and Vegetation Design in the Landscape Garden

The use of plants in large landscape gardens follows different principles than in formal gardens. The focus is not on the individual plant with its botanical characteristics, but on the effect of the mass of plants within the space. For woody plantings, native tree species were and continue to be used predominantly; in Central Europe, these include oak, beech, hornbeam, linden, ash, maple, and alder, supplemented by introduced species such as plane tree, horse chestnut, and various conifers, which have been widespread in European landscape gardens since the 18th century.

Creating woody plantings in the landscape garden style requires thinking in terms of long time frames. A tree planted today as a solitary specimen will not fully unfold its spatial impact until decades later. Capability Brown is said to have remarked that he worked for posterity, not for the present. This temporal dimension is a fundamental difference from architecture: the landscape garden is never finished; it changes continuously through the growth, aging, and loss of trees and shrubs. Professional care and maintenance must guide this process without destroying the original design concept.

The lawns of historic landscape gardens were originally maintained through grazing by sheep and cattle, which also served an ecologically valuable purpose. With the invention of the lawn mower in the 19th century and the increasing mechanization of maintenance, maintenance practices changed fundamentally. Today, those responsible for maintenance face the challenge of balancing the preservation of the historic character, the demands of visitor use, and the goals of promoting biodiversity. Extensive meadow management with infrequent mowing, the creation of wildflower strips, and the promotion of old-growth wood in groups of trees and shrubs are strategies that are increasingly being incorporated into modern maintenance concepts for historic landscape gardens.

The introduction of exotic woody plants, particularly rhododendron species and conifers from North America and East Asia, was a significant expansion of the plant repertoire in the 19th century. Many historic landscape gardens today contain significant collections of these species, which have since acquired historical value in their own right. At the same time, Rhododendron ponticum has become an invasive problem in Atlantic-influenced regions of Great Britain and Ireland, threatening the ecological integrity of historic sites. This tension between historical authenticity and ecological responsibility is a central theme in today’s preservation of landscape gardens.

Maintenance, Preservation, and Management Concepts for Historic Sites

Historic landscape gardens pose special challenges for heritage conservation because their heritage value lies not in solid materials but in a living, ever-changing composition of vegetation, topography, water, and architecture. The challenge lies in preserving the spirit of the original design without freezing the growth of the vegetation or reducing the site to an artificial state. Maintenance concepts for historic landscape gardens must therefore be based on a careful historical analysis that evaluates sources such as original plans, paintings, engravings, travelogues, and plant lists.

In Germany, historic garden conservation has established itself as a distinct discipline situated at the intersection of landscape architecture, historic preservation, and garden history. The Florence Charter, a document adopted in 1981 by the International Council on Monuments and Sites (ICOMOS), defines principles for the preservation of historic gardens and parks. It emphasizes that the historic garden is a living monument that requires continuous care, and that restoration measures must be based on documented sources.

Practical maintenance tasks in historic landscape gardens include the regular inspection and care of tree and shrub populations, the preservation and restoration of water features and ornamental structures, the maintenance of lawns and paths, and the management of visitor flows. The latter is a particularly complex task in heavily visited sites such as the English Garden in Munich or Sanssouci Park in Potsdam, where user needs, historic preservation, and ecological goals must be balanced. Foot traffic, soil compaction, and damage to the root systems of old trees caused by visitors are real threats that are mitigated through route guidance, signage, and, if necessary, temporary closures.

Significance for Contemporary Open-Space Planning, Climate Adaptation, and Biodiversity

The large landscape garden is not a museum relic, but rather a reference model that remains highly relevant for today’s open-space planning and urban development. Its fundamental principles—the linking of open spaces into contiguous green spaces, the use of topography and water as design elements, and the creation of spatial diversity through the alternation of open and enclosed areas—are reflected in modern concepts such as the Green Belt, Green Infrastructure, and the 21st-century city park.

In the context of climate adaptation, this type of landscape garden offers specific advantages. Extensive stands of trees and shrubs create cooling effects through evaporation and shading, which are increasingly in demand in overheated cities. Extensive lawns and water bodies help regulate the urban water cycle by absorbing, temporarily storing, and gradually releasing rainwater. The topography of many historic landscape gardens—with hollows, depressions, and ponds—corresponds in its basic structure to the principle of the “sponge city” (a concept of water-sensitive urban planning), which is currently being discussed as a response to increasing heavy rainfall events.

For biodiversity, large-scale landscape gardens—with their stands of mature trees, extensive lawns, bodies of water, and wooded edges—serve as valuable habitats. Old oaks, beeches, and linden trees, with their hollows, cracks, and dead branches, provide habitat structures for bats, woodpeckers, beetles, and numerous other species that can hardly find a place in intensively used urban landscapes. Promoting deadwood, adopting a more extensive approach to lawn care, and creating riparian buffer zones are measures that can enhance the ecological value of historic landscape gardens without compromising their character.

At the same time, open-space planning must critically reflect on what the grand landscape garden historically also was: an instrument of land acquisition and social segregation. Many of the most significant English landscape gardens were created through the enclosure and transformation of common land—a process that displaced villages and dispossessed farmers. This socio-historical dimension is essential to a complete understanding of the type, even if it does not negate its aesthetic and ecological value.

The Grand Landscape Garden as an Enduring Design Model

The large landscape garden established a design philosophy that extends far beyond its historical context of origin. The idea that open space is designed not through geometry but through reflection on spatial sequences, visual relationships, movement, and atmosphere remains a fundamental principle of landscape architecture to this day. Anyone planning a city park, a park complex, or a large-scale open space works—consciously or unconsciously—with techniques developed in 18th-century English landscape gardens.

The strength of this typology lies in its adaptability. The large landscape garden can serve simultaneously as a recreational space, a nature conservation area, a climate buffer, a cultural heritage site, and a source of urban identity. It requires its planners and caretakers to think in the long term, to understand ecological processes, and to exercise aesthetic judgment that transcends short-term trends. This combination makes it a challenging yet rewarding field of practice for landscape architecture.

The great historic gardens—from Stourhead to Wörlitz to the English Garden in Munich—are not only testaments to a bygone era of garden art, but also living laboratories where one can observe how vegetation, topography, water, and architecture have interacted over the centuries. Anyone who walks through these gardens with a knowledgeable eye learns more about open-space planning than from many textbooks. The grand landscape garden remains what it has been since its inception: a design model of extraordinary depth and durability.

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Museums are not the only ones using podcasts to introduce themselves. The restoration sciences are also discovering this medium. Students at the University of Amsterdam have now launched a restoration podcast


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Students at the University of Amsterdam have now launched a restoration podcast
Photo: Screenshot Instagram/ecpodcast

The new podcast format “ECPodcast – by and for Emerging Conservation Professionals”, which five Master’s students at the University of Amsterdam have developed in recent weeks, is just over two weeks old. The series provides insights into the “Conservation & Restoration” course at the University of Amsterdam. In the first episode, Mané van Veldhuizen, Anthi Soulioti, Willemijn Bolderman, Terri Costello and Liz Hébert talk about their specializations and report on their recruitment test. They have now been at university for a year. The second episode is already online – here the students talk to Professor Ellen Hendriks, who is involved in the program’s application process: How did Covid-19 affect the selection week? Just listen in: www.ecpodcast.de