The New NPPF 2026: What Does It Mean for Self-Build and Residential Development?

The new National Planning Policy Framework (NPPF) was published today, 17 August 2026.

​What does it mean for self-builders, homeowners and small residential developers?
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The NPPF 2026 strengthens the Government's focus on delivering more homes and making better use of suitable land.

​For self-builders and landowners, the changes could create new opportunities for small-scale residential development, infill housing and self-build plots.

What does the new NPPF mean for self-build?

The new NPPF continues to recognise the importance of self-build and custom-build housing, including the contribution that small sites can make to housing delivery.
This is particularly relevant if you are looking for, or already own:

• A self-build plot
• A large garden
• An infill site
• Brownfield land
• A redundant building
• Land within or adjoining a settlement
• A small residential development opportunity

​What about Green Belt and Grey Belt land?

The new NPPF continues the Government's approach to Grey Belt and appropriate Green Belt development.

This does not mean that all Green Belt land can be developed. However, landowners with sites close to settlements or transport links should consider whether the new national policy changes the planning prospects of their land.

Mark Doodes Planning has experience in assessing and promoting residential development opportunities, including Green Belt and self-build projects. (Mark Doodes Planning Consultants)

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Mark Doodes Planning appraise the planning merits of sites to help clients understand the potential of land they own or ahead of prospective purchase, giving a steer on the likelihood of securing a planning consent

Mark Doodes Planning has extensive experience advising
​self-builders, from assessing potential plots through to securing planning permission

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​More support for small residential sites

The new NPPF places greater emphasis on making efficient use of land and delivering housing through small and medium-sized sites.
For homeowners and landowners, this means it may be worth reassessing land that was previously considered too small or difficult to develop.
A garden, infill plot or underused parcel of land could potentially provide:

• A new dwelling
• A replacement home
• A self-build plot
• Several new homes
• A small residential scheme

However, planning permission is never guaranteed. Site-specific matters such as access, design, character, ecology, flooding and neighbouring amenity will remain important.

​​Mark Doodes Planning has experience in assessing and promoting residential development opportunities, including Green Belt and self-build projects. 

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​Could your land now have residential development potential?

The new NPPF is a good reason to reassess your site.

If you own a garden, paddock, redundant building, infill plot or other land that could accommodate a new home, our planning consultants can assess its potential under the new planning framework.

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The key takeaway

For self-builders, homeowners and small developers, the NPPF 2026 provides stronger support for:

• Self-build and custom-build homes
• Small residential sites
• Infill development
• Brownfield redevelopment
• Efficient use of land
• Residential development in sustainable locations
• Housing around well-connected railway stations
• Appropriate Grey Belt and Green Belt development

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If your site has previously been refused, or considered unsuitable, for residential development, now could be the right time to have it reassessed against the new NPPF 2026. Contact us to see how we can help you exploit the potential of the NPPF 2026.
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This article provides a general overview of the new NPPF and should not be treated as planning or legal advice. Individual sites will still need to be assessed against the full Framework, the development plan and other relevant planning considerations.