New Planning Rules Are Now in Force — Which Development Sites Need to Be Re-Appraised?

A development appraisal prepared six or twelve months ago may no longer describe the same planning opportunity. England has a new National Planning Policy Framework, and for some transport-connected, higher-density and strategic sites, the change could affect not only planning prospects but land value, Gross Development Value, leverage and the amount of capital required to deliver the scheme.

The government published its new National Planning Policy Framework on 17 August 2026, replacing the previous version and establishing a revised national framework for plan-making and decisions on development proposals in England.

The changes are particularly important for development around railway, Underground, tram and other well-connected transport locations. The framework strengthens the policy support for making better use of accessible land, including higher-density housing in appropriate locations.

For property developers, strategic landowners and their advisers, this creates a much more practical question than whether planning policy has become generally more supportive of housing.

Which sites now deserve to be re-appraised?

That distinction matters because development finance is ultimately underwritten against a specific scheme. If planning policy changes the realistic scale, density, value or timing of that scheme, the finance requirement can change with it.

Why the New NPPF Is a Development Finance Story

Planning and finance are inseparable in property development.

A lender assessing a development site needs to understand what can actually be built, what it will cost, what the completed scheme should be worth and how long it will take before the debt can be repaid.

Change one of those variables and the finance case changes.

If a site can support greater density, for example, its potential Gross Development Value may increase. But so might the build cost, professional fees, infrastructure requirement, affordable-housing contribution, construction period and equity commitment.

The result is not automatically a larger loan or a more valuable site. It is a different development appraisal.

That is why the immediate opportunity following the new NPPF is not simply to look for new land. Developers should also revisit sites they already own, sites they previously rejected and assets currently being used at a relatively low density.

Transport-Hub Sites Deserve the First Review

The clearest place to start is land around well-connected railway, tram, Underground and light-rail stations.

The government's policy direction is explicitly intended to support more housing in locations where residents can access employment, services and transport without depending as heavily on private cars.

That can make sites close to stations more interesting where an earlier appraisal assumed relatively low density or where development prospects were constrained by the previous planning framework.

The opportunity is wider than vacant development land.

Developers should consider whether existing commercial buildings, older industrial assets, surface parking, low-density residential property, secondary retail sites or other underused assets close to transport infrastructure now warrant a fresh planning and viability assessment.

A site that previously looked marginal may not remain marginal if the planning policy supporting intensification has materially strengthened.

Higher Density Can Increase GDV — But That Is Only Half the Appraisal

Greater density can transform the economics of a development site.

Consider land previously appraised for 80 apartments. If planning advice now indicates that a materially larger scheme could be supportable, the potential sales value of the completed development may increase significantly.

That higher GDV can potentially support a larger development facility. Senior development lenders frequently assess leverage using measures such as Loan to Cost and Loan to Gross Development Value, alongside minimum developer-equity and profit requirements.

But developers should not make the mistake of treating every additional pound of GDV as additional financeable value.

Higher-density development can require more complex foundations, lifts, fire-safety systems, communal areas, professional input, infrastructure, utilities and construction management. Taller or larger schemes may also take longer to build and sell.

Affordable-housing and Section 106 requirements can change as the scale of a scheme changes. Planning conditions can create further costs, while the increased development period means interest may roll up for longer.

A re-appraisal therefore needs to examine both sides of the equation: the additional value created and the additional capital required to create it.

Land Previously Considered Too Speculative May Need Another Look

Planning risk has a direct relationship with land-finance risk.

A lender advancing against land without a satisfactory planning position cannot simply rely on the value of a future development. It must consider what the land is worth today and what happens if the expected permission never materialises.

This is why unconsented land normally attracts more conservative leverage than a site with detailed planning permission.

The new NPPF does not eliminate that risk. Stronger national policy support is not the same as a planning consent, and individual sites remain subject to local constraints, technical assessments and the planning process.

It can, however, change the planning evidence around a site.

Where planning consultants now believe a previously marginal location has materially stronger prospects, it may be worth testing whether specialist land lenders or bridging lenders will reconsider the acquisition or refinance.

The lender still needs a credible downside position. But the planning trajectory forming the exit strategy may now be different from the one assessed under the previous framework.

Retail Parks and Large Surface Car Parks Could Become More Interesting

Another category worth reviewing is low-density commercial land, particularly larger retail and similar sites where substantial areas are dedicated to surface parking.

These assets can occupy significant parcels of well-connected urban land while producing relatively modest development density.

A planning framework that places greater emphasis on efficient use of land and transport connectivity can strengthen the strategic case for intensification or mixed-use redevelopment in suitable locations.

That does not mean every retail park suddenly becomes a residential development site. Existing occupational income, leases, access, servicing, contamination, neighbouring uses and local planning policy all remain important.

But owners should ask whether the highest-value long-term use of the site has changed.

For an investor holding a low-leverage commercial asset, that can create several financing conversations: capital raising against the existing property, bridging while planning is pursued, acquisition finance for adjoining plots, or development funding once the scheme is sufficiently advanced.

Existing Owners May Be Better Positioned Than New Buyers

Some of the most attractive opportunities created by a planning-policy change can belong to owners who already control the land.

An existing owner does not necessarily have to pay a new price reflecting the improved planning potential. If a site has been held for several years, there may also be substantial equity between the historic acquisition cost and current value.

That can create financing flexibility.

Equity in the existing asset may help fund architects, planning consultants, surveys and other pre-development costs. In suitable cases, capital can potentially be raised against the existing security while the owner works towards a more valuable planning position.

Once planning is sufficiently advanced, the funding strategy can then move from land or bridging finance into a dedicated development facility.

The key is structuring the first facility with the intended development journey in mind. A cheap land loan can become expensive if its release provisions, maturity date or planning conditions make the eventual development refinance unnecessarily difficult.

The Development Appraisal Should Be Rebuilt, Not Simply Uplifted

If planning advice suggests a site's potential has improved, simply adding a percentage to the previous GDV is not enough.

The appraisal should be rebuilt from the land upwards.

That means establishing the new unit count or floor area, realistic sales or investment values, revised construction costs, professional fees, planning obligations, infrastructure expenditure, finance costs, contingency and development period.

The revised residual land value can then be compared with the site's current value and any existing borrowing.

For a lender, the crucial issue is whether the additional value produces a robust enough margin after all of those costs have been recognised.

A scheme with £5 million more GDV but £4.5 million of additional build, infrastructure, finance and planning costs is fundamentally different from one where the same £5 million of additional value requires only £2 million of extra expenditure.

Planning potential matters. Planning viability matters more.

Existing Debt Should Be Included in the Review

Landowners often think about planning first and finance later. Where the site already carries debt, that can be a mistake.

The current lender may have security over the entire property and may need to consent to planning applications, demolition, changes in use, title alterations or further borrowing.

A facility originally arranged against an income-producing commercial asset may also be unsuitable once the borrower begins pursuing redevelopment.

If planning prospects have improved, the owner should therefore review the existing debt at the same time as the development appraisal.

There may be an opportunity to refinance onto a structure that provides greater flexibility for planning expenditure, vacant possession, site assembly or eventual development. Conversely, replacing inexpensive long-term debt too early can unnecessarily increase finance costs.

The correct answer depends on the planning timetable and the point at which the existing asset genuinely transitions into a development project.

Strategic Sites Need a Capital Strategy, Not Just a Bigger Facility

Large strategic developments create a different funding challenge.

At this scale, the financing question extends beyond how much a senior lender will advance against land and construction. Infrastructure, planning obligations, affordable housing, phased delivery and long development periods can require multiple layers of capital.

A strategic site may involve senior development debt alongside sponsor equity, mezzanine finance, preferred equity, infrastructure funding, forward sales or institutional capital.

It may also be inappropriate to finance the entire project under one facility. Different phases can have different risk profiles, values and exit strategies.

Where the new planning framework improves the prospects of a major site, the sponsor should therefore avoid viewing the opportunity simply as a higher land valuation.

The more important exercise is determining how the site can actually be funded through planning, infrastructure, construction and eventual disposal or long-term investment.

Planning Gain Can Create Value Before Construction Starts

Not every landowner who benefits from stronger planning policy will become the eventual developer.

Some investors deliberately acquire or hold land, improve its planning position and then sell to a housebuilder or development partner.

In these situations, the finance is effectively supporting planning gain rather than construction.

A lender assessing that strategy needs to understand the current land value, acquisition basis, planning expenditure, expected timetable and the likely value or marketability of the site once planning has been achieved.

Stronger policy support can improve the credibility of that exit, but it does not remove execution risk. Technical issues including access, highways, ecology, utilities, flood risk and local infrastructure can still prevent a site from delivering the value assumed by the borrower.

That is why specialist land finance is usually structured more conservatively than development finance against a fully consented scheme.

The Valuation May Not Move as Quickly as the Planning Narrative

Developers should also distinguish between improved development potential and immediately bankable land value.

A planning consultant may conclude that a site has materially better prospects under the new framework. A lender's valuer may still place relatively limited value on that upside until the planning position becomes more advanced.

This is particularly important where a borrower wants to raise capital against an uplift that has not yet been secured through consent.

The valuer may consider hope value, but the lender will usually apply its own credit policy to that figure. Some lenders will lend largely against existing use value. Others will recognise more of the planning potential where the evidence is strong.

Lender selection therefore becomes critical where the finance case depends on future planning gain rather than an existing permission.

More Development Potential Can Mean More Equity, Not Less

One counterintuitive consequence of a more valuable development scheme is that the developer may need to invest more equity.

Suppose a revised appraisal supports a substantially larger project. The lender may be prepared to increase its facility, but the build cost and total capital requirement may rise even faster.

Infrastructure expenditure can be particularly significant on larger schemes because roads, utilities, drainage, public realm and community facilities may need to be delivered before large numbers of units can be sold.

The sponsor therefore needs to understand the peak equity requirement, not merely the maximum loan.

Where the equity requirement exceeds available capital, there may be alternatives including joint ventures, mezzanine funding, preferred equity, forward funding or disposal of part of the site.

The new planning framework can create a bigger opportunity while simultaneously creating a bigger funding problem. Both need to be modelled before the developer commits to the revised scheme.

Section 106 and Infrastructure Cannot Be Treated as Afterthoughts

Higher density can improve the gross economics of a site, but planning obligations and infrastructure can absorb a substantial proportion of the apparent uplift.

Affordable housing, highways improvements, education contributions, public realm and other obligations can materially affect the residual value of development land.

They also affect finance because lenders need to understand when those liabilities fall due.

A £1 million planning obligation payable late in the development has a different cash-flow effect from £1 million that must be funded before the first construction drawdown.

The same applies to infrastructure. A development may be profitable overall but require substantial upfront equity if roads and services have to be installed before saleable units can progress.

The government's wider work around standardising elements of the Section 106 process will therefore be worth monitoring alongside the new NPPF, but current appraisals should continue to use the actual obligations and assumptions applicable to the individual site.

Housing Delivery Performance Can Also Matter

The latest policy changes sit alongside the government's continuing focus on whether local authorities are delivering sufficient housing.

For developers, local housing delivery performance is another piece of the planning evidence rather than a standalone guarantee that an application will succeed.

Sites in authorities where housing delivery is under pressure may warrant particular attention when combined with strong transport connectivity, suitable design and compliance with the wider planning framework.

Again, this is where planning consultants and land agents become important to the finance process.

A lender does not need a generic explanation that the government wants more homes. It needs site-specific evidence explaining why this particular development has a credible route through planning.

Planning Consultants and Land Agents May Identify the Opportunity First

The first people to recognise which sites have become more interesting may not be lenders or developers.

Planning consultants will be reviewing the new framework against existing applications, rejected schemes, emerging local plans and land portfolios. Land agents will be assessing whether the residual value or marketability of particular sites has changed.

Development valuers, architects, quantity surveyors and commercial agents will also see opportunities before a formal funding requirement reaches the market.

That creates a useful professional conversation:

Which of your clients owns a site whose development potential has changed under the new NPPF?

Once that site has been identified, the finance appraisal can be rebuilt around the revised planning advice rather than relying on an outdated scheme.

Bridging Can Provide the Link Between Today's Asset and Tomorrow's Development

Not every site will be ready for development finance immediately.

An owner may need to secure the property, obtain vacant possession, assemble adjoining land, progress planning or complete technical work before a development lender can underwrite the final scheme.

Bridging finance can sometimes provide that intermediate capital.

The important issue is the exit. A bridge used to acquire or refinance development land should be structured around a credible next step rather than simply an expectation that planning will somehow increase the value.

That exit might be a development facility once detailed planning is secured, sale of the consented site, institutional investment or another longer-term funding structure.

The stronger the evidence behind that exit, the more financeable the transaction becomes.

Developers Should Re-Test Sites They Previously Rejected

Perhaps the most overlooked opportunity is the development that never happened.

Developers routinely assess sites and decide not to proceed because the unit count is too low, planning risk is too high, residual land value does not support the vendor's price or the scheme does not produce a sufficient development margin.

Some of those decisions will remain correct.

Others may have been based on planning assumptions that have now changed.

A site close to a station that failed at 60 units may work at 90. A low-density commercial asset that could not justify conversion may work under a more ambitious redevelopment. A land purchase that required too much speculative equity may look different if the route to consent has strengthened.

Developers do not necessarily need to find entirely new opportunities. There may be value in reopening the appraisal files on the old ones.

Do Not Pay Tomorrow's Land Value Before Securing Tomorrow's Planning

There is also an obvious risk.

Once planning rules become more supportive, vendors can quickly begin pricing land as though the best possible development outcome has already been achieved.

A developer then risks paying for planning gain before actually securing it.

Development lenders are unlikely to solve that problem simply by advancing more money. They will still assess the site's present value, planning status, purchase price and downside protection.

Where significant planning upside remains unproven, conditional contracts, options, overage arrangements or other acquisition structures may sometimes provide a more appropriate way to share planning risk than paying the full anticipated value on day one.

The strongest planning opportunity can become a weak development deal if the land is acquired at the wrong basis.

How Willow Private Finance Can Help

Willow Private Finance works with developers, landowners, investors and professional advisers across land acquisition, bridging, development finance, development-exit funding and more complex capital structures.

Where the planning position of a site has changed, our role is to translate the revised development appraisal into a finance strategy.

That can include testing whether existing debt remains appropriate, identifying land or bridging finance while planning progresses, comparing senior development facilities once consent is sufficiently advanced and assessing whether additional capital such as mezzanine or preferred equity is required.

The new NPPF does not make every site financeable, nor does stronger planning support guarantee consent.

What it does create is a clear reason to review development assumptions that may now be out of date.

For land close to well-connected transport, low-density commercial assets, larger redevelopment opportunities and strategic sites, the question is no longer simply what the site was worth under the old planning framework.

It is what can realistically be delivered now — and how that revised scheme should be financed.