WHY UNDERSTANDING HOW PLANNING APPLICATIONS ARE DETERMINED MATTERS FOR LANDSCAPE ARCHITECTURE

The UK Government’s guidance on determining planning applications provides a clear framework for how decisions are made—and highlights the growing importance of landscape architecture within the planning process.

At its core, planning law requires that applications are determined in accordance with the development plan, unless material considerations indicate otherwise.

These material considerations include a wide range of factors, notably:

• Landscape character

• Visual impact

• Biodiversity and environmental quality

• The relationship between development and its surroundings

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The Role of Landscape in Decision-Making

Landscape is not an add-on to the planning process—it is embedded within it.

Local planning authorities assess proposals against:

• National policy (NPPF)

• Local development plans

• Site-specific and environmental constraints

Within this context, landscape input contributes to key planning considerations such as:

• Design quality and sense of place

• Integration of development into its setting

• Green infrastructure and SuDS strategies

• Biodiversity Net Gain (BNG)

• Visual and landscape effects

In practice, this means that landscape architects play a critical role in shaping whether a proposal is acceptable in planning terms.

Timing, Process, and Risk

The guidance also reinforces the importance of timing:

• Major applications are typically determined within 26 weeks

• Non-major applications within 16 weeks 

Where applications lack sufficient supporting information, delays are likely. This is particularly relevant where landscape issues are complex or sensitive.

Early-stage input—through site appraisal, constraints analysis, and design strategy—can:

• Reduce the risk of refusal

• Avoid costly redesign

• Streamline the planning process

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Consultation and Environmental Considerations

Planning decisions often involve consultation with statutory bodies such as:

• The Environment Agency

• Natural England

• Highways authorities

These consultees frequently focus on issues closely aligned with landscape architecture, including:

• Flood risk and drainage

• Ecology and habitat protection

• Infrastructure integration

This reinforces the need for coordinated, multidisciplinary input—where landscape plays a central role.

Implications for Clients and Projects

For homeowners, developers, and project teams, the implications are clear:

• Landscape is a key planning consideration, not a secondary detail

• Robust, policy-aware landscape input can strengthen applications

• Early engagement reduces programme risk and uncertainty

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Conclusion

The planning system is increasingly focused on delivering sustainable, high-quality places. Landscape architecture sits at the intersection of design, environment, and policy—making it fundamental to successful planning outcomes.

Need support with planning or landscape input?

If you require professional landscape architecture services to support a planning application—whether through site appraisal, design input, or supporting reports—please get in touch to discuss your project.