Why Commercial Property Investors Should Check Rights of Light Before Buying Development Property

An investor finds a commercial site with an obvious development opportunity.

Perhaps there is potential to:

• Extend the existing building
• Add another floor
• Build on part of the yard
• Replace an older building with a larger scheme

The numbers look attractive.

The site is acquired.

Architects begin designing the development.

Planning work progresses.

Then somebody raises a question that had barely appeared in the original appraisal:

What about the neighbouring property’s rights of light?

For development property in England and Wales, that can be an important due-diligence issue.

Rights of light are private legal rights rather than simply another planning consideration. RICS describes a right of light as a legally enforceable easement or right to a minimum level of natural illumination, and its professional guidance notes that disputes can have serious consequences for development, including compensation, design changes and potentially injunctions.

That means an investor should not assume:

“If we get planning permission, we can definitely build it.”

Planning permission and private rights are different issues.

What Is a Right of Light?

A right of light relates to natural light reaching a building through defined openings such as windows.

It is not simply:

• A nice view
• Direct sunshine
• Privacy

RICS distinguishes rights of light from these wider amenity issues.

Rights Can Develop Over Time

Rights of light can arise in different ways.

One important route in England and Wales is through long-term enjoyment of light.

RICS explains that rights are commonly acquired through prescription after at least 20 years of qualifying enjoyment, although the legal position should always be assessed for the individual property.

Why Does This Matter to a Commercial Investor?

Because the development you want to build may reduce light reaching neighbouring buildings.

If those neighbours benefit from legally enforceable rights, the development strategy may face additional risk.

Development Density Creates More Potential Conflict

Imagine an old commercial site containing:

• One low warehouse
• Large yard

An investor proposes replacing it with:

• Multi-storey development

The new building envelope may affect neighbouring windows in a completely different way.

The Existing Building Is Only the Starting Point

A property can be perfectly straightforward in its current form.

The issue may arise only because of what the investor intends to build.

This is why development due diligence needs to consider:

Existing property

and

proposed development.

Planning Permission Does Not Automatically Remove Private Rights

This is one of the most important distinctions.

Planning permission is a public-law process.

Rights of light are private property rights.

RICS specifically notes that rights of light can potentially restrain development even where planning permission exists.

Do Not Confuse Daylight Planning Assessments With Rights of Light

They are related to natural light but are not the same exercise.

Planning authorities may consider daylight and sunlight effects as part of the planning process.

Private rights of light involve separate legal rights.

RICS maintains separate professional standards covering rights of light and daylight/sunlight assessment.

Passing a Planning Daylight Assessment Does Not Automatically Resolve Rights of Light

An investor needs to understand both regimes where relevant.

Do not assume one report answers both questions.

Start With the Development Envelope

Before commissioning detailed work, understand what is proposed.

Will the scheme:

• Increase height?
• Move closer to boundaries?
• Fill existing gaps?

The more dramatically the massing changes, the more carefully neighbouring properties may need to be considered.

Look at the Neighbours

Walk around the site.

Do neighbouring buildings have windows facing the proposed development?

Look at:

• Offices
• Residential buildings
• Workshops

This is only an initial observation, not a legal or technical assessment.

Old Neighbouring Buildings Deserve Particular Attention

A building that has stood beside the site for decades may have enjoyed light through particular windows for a long period.

That does not automatically establish a right, but it is a reason to investigate.

Do Not Rely on Google Maps Alone

Online imagery can help initial investigation.

But development decisions require proper information.

Buildings change.

Windows are altered.

Extensions are constructed.

Professional surveys may be needed.

Rights of Light Is a Specialist Area

This is not an issue to estimate casually.

RICS treats rights of light as a specialist surveying discipline and its current professional standard covers matters including measured/geospatial surveys, insurance and compensation.

Engage Specialists Early

The best time to identify a rights-of-light issue is not after:

• Purchase
• Planning
• Construction commencement

Early investigation can influence the acquisition itself.

Acquisition Due Diligence Should Match the Investment Strategy

If the investor is buying a fully let warehouse purely for income, extensive development analysis may not always be proportionate.

If the purchase price depends on adding significant additional floor area, the position is very different.

Development Upside Needs Development Due Diligence

The more value attributed to future development, the more important it becomes to investigate constraints to that development.

This can include:

• Planning
• Title
• Access
• Rights of light

Separate Existing Value From Development Value

Suppose a property is worth:

£2 million as it stands

but the investor is prepared to pay:

£3 million

because redevelopment appears possible.

That extra £1 million is effectively being paid for future potential.

If rights-of-light issues materially reduce that potential, the investment thesis changes.

Do Not Pay for Unverified Potential

This is a wider commercial-property principle.

Development opportunity should be investigated before it is fully reflected in the purchase price.

Initial Desktop Assessment Can Help

A specialist may begin by reviewing information relating to:

• Existing buildings
• Proposed massing
• Neighbouring properties

The appropriate scope depends on the site.

More Detailed Surveys May Follow

Modern rights-of-light practice can involve detailed geospatial and measured information. RICS’s third-edition professional standard includes comprehensive coverage of these survey methods, and recent RICS commentary notes that advanced geospatial data now plays an integral role in specialist practice.

3D Modelling Can Be Important

Development teams may model the existing and proposed environment to understand how the scheme could affect neighbouring light.

This can inform:

• Design
• Risk assessment
• Negotiations

Better Data Can Improve Decisions

A crude assumption such as:

“The neighbour is quite far away, so it should be fine”

is not a substitute for technical analysis.

Rights of Light Can Influence Building Height

Suppose the original appraisal assumes a five-storey extension.

Analysis might indicate significant risk at that height.

A revised design might reduce or reshape the upper floors.

That Changes the Financial Appraisal

Losing floor area can reduce:

• Rental income
• Sale value

The development appraisal should therefore reflect realistic buildable accommodation.

Rights of Light Can Influence Building Shape

The answer is not always simply:

“Make the whole building shorter.”

Specialist analysis may help the design team understand where the proposed massing creates the greatest impact.

Design Optimisation Can Be Valuable

A revised scheme may preserve much of the intended floor area while reducing risk.

This is why early collaboration between:

• Architect
• Rights-of-light surveyor
• Planning consultant

can be useful.

Late Redesign Is Expensive

If the issue is identified after detailed architectural and engineering work, changes can affect:

• Structure
• Planning
• Cost plan

Early investigation can therefore save more than the cost of the survey itself.

Neighbouring Commercial Property Can Have Rights Too

Do not assume rights of light are only a residential issue.

RICS’s professional guidance expressly recognises their implications for both residential and commercial development.

Commercial Windows Can Matter

A neighbouring:

• Office
• Workshop
• Commercial building

may require investigation depending on the circumstances.

Tenants Can Also Be Relevant

Rights of light are property rights and the ownership and occupational structure around the site can matter.

RICS notes that interests in land, including leasehold interests, can be relevant in rights-of-light matters.

Understand Neighbouring Ownership

Land Registry information can help identify registered ownership.

HM Land Registry

Legal advisers can then investigate relevant rights and interests.

Title Review Remains Essential

Rights-of-light work should sit alongside wider legal due diligence.

Solicitors may investigate matters including:

• Express rights
• Easements
• Title documentation

The surveyor and solicitor may need to coordinate.

Do Not Assume Silence Means No Risk

A neighbouring owner may not raise an issue during the planning application.

That does not automatically mean private rights have disappeared.

This is another reason planning and rights-of-light analysis should be treated separately.

Planning Objections and Private Rights Are Different

A neighbour may object to planning for one reason while having a private legal right arising from another.

The development team needs to distinguish the two.

What Can Happen if a Right Is Infringed?

The consequences can potentially include:

• Negotiation
• Compensation
• Design alteration
• Legal proceedings

RICS’s current professional standard highlights that rights-of-light disputes can lead to injunctions, compensation payments, changes to design and, in serious circumstances, even demolition of non-compliant structures.

Injunction Risk Is Why Early Advice Matters

An investor should not assume that every problem can simply be solved later by writing a cheque.

The available remedy depends on the circumstances.

Current RICS commentary stresses that developers should not rely on simplistic assumptions that damages will inevitably replace injunctions.

Compensation Can Affect Viability

Even where a commercial settlement is possible, the cost can affect:

• Land value
• Development profit

It belongs in the appraisal.

Include Rights-of-Light Risk in the Development Budget

Depending on specialist advice, an appraisal may need to consider:

• Professional fees
• Potential negotiation
• Insurance

The exact treatment will depend on the project.

Insurance May Sometimes Be Considered

Specialist rights-of-light insurance exists.

But insurance is not a magic solution.

RICS notes that insurance is one part of the risk-management landscape and that rights-of-light risk can remain significant.

Speak to Advisers Before Approaching Neighbours

This can be particularly important where insurance is being considered.

Certain actions or communications may affect available options.

Obtain specialist legal and insurance advice before beginning informal negotiations.

Do Not Knock on the Neighbour’s Door Without a Strategy

Friendly communication can be valuable in property development.

But rights-of-light matters can have legal and insurance consequences.

The development team should decide the correct approach first.

Confidentiality Can Matter

RICS commentary notes that rights-of-light insurance arrangements can contain strict confidentiality requirements and that inappropriate disclosure can affect cover.

This reinforces the need for specialist advice.

Rights of Light Should Be Considered Before Land Price Is Finalised

Imagine two development sites.

Site A

Allows the intended development with relatively limited third-party risk.

Site B

Requires substantial redesign and neighbour negotiations.

They should not necessarily be valued identically.

Development Constraints Affect Residual Land Value

If fewer square feet can realistically be developed, the land value may reduce.

This should feed back into acquisition negotiations.

Option Agreements Can Sometimes Reduce Acquisition Risk

Where appropriate, developers may use contractual structures allowing investigations before becoming fully committed to an acquisition.

The exact arrangement requires legal advice.

RICS publishes professional guidance covering land agreements for development purposes, reflecting the importance of properly structuring responsibilities and commercial arrangements in development transactions.

Conditional Contracts May Also Be Relevant

Depending on the transaction, acquisition could potentially be conditional on certain matters.

Again, the appropriate structure is transaction-specific.

Due Diligence Is About Discovering Problems While You Still Have Choices

Before completion, an investor may be able to:

• Renegotiate
• Redesign
• Withdraw

After completion, those options may be narrower.

Rights of Light Is Especially Relevant in Dense Locations

The closer buildings are to one another, the greater the potential for new development to affect neighbouring light.

This can make the issue particularly important in:

• Town centres
• Urban redevelopment
• Mixed-use schemes

But Industrial Sites Should Not Ignore It

Industrial investors may think:

“This is only a city-centre office issue.”

Not necessarily.

An industrial redevelopment involving:

• Taller warehouses
• Multi-storey accommodation
• Boundary development

can still require consideration.

Older Industrial Areas Can Create Complex Relationships

North Manchester contains many long-established commercial areas where:

• Factories
• Houses
• Workshops
• Offices

have developed close together over decades.

That can make neighbouring rights an important part of redevelopment due diligence.

Mixed-Use Areas Deserve Particular Attention

A commercial site next to residential property may present a different risk profile from an isolated industrial estate.

Understand the context.

Extensions Can Trigger Issues Too

Rights-of-light due diligence is not limited to complete redevelopment.

A landlord proposing:

• Side extension
• Additional storey

may also need advice.

Rooftop Development Can Change the Building Envelope Dramatically

An investor may see a flat commercial roof and think:

“We can build another floor.”

Perhaps.

But additional height can affect neighbouring light.

Investigate before valuing the opportunity.

Airspace Has Value Only if It Can Be Used

Theoretical development volume is not the same as commercially deliverable floor area.

Rights-of-light analysis is one part of establishing the difference.

Development Finance Can Be Affected by Uncertainty

Funders want to understand risks that could prevent or delay development.

A material unresolved rights-of-light issue may therefore become part of funding due diligence.

Recent RICS commentary identifies funding due diligence, insurance strategy and early-stage site acquisition as areas where specialist rights-of-light advice increasingly plays a role.

Provide Advisers With Accurate Information

The quality of the assessment depends partly on the quality of:

• Survey information
• Proposed drawings
• Neighbouring-building data

Poor information can produce poor decisions.

Keep the Assessment Updated as the Scheme Changes

If the architect substantially changes:

• Height
• Massing
• Position

the earlier analysis may no longer reflect the proposal.

Development due diligence is not always a one-off exercise.

Rights of Light Can Become a Design Tool

This is an important mindset.

Instead of treating the issue only as:

“Something that might stop us building,”

developers can use the analysis to help optimise the scheme.

Identify the Highest-Risk Areas

The design team may be able to understand which parts of the proposed envelope create the greatest potential impact.

This can inform revisions.

Compare Design Options Financially

Perhaps:

Scheme A

Creates maximum floor area but significant third-party risk.

Scheme B

Creates slightly less floor area but materially lower risk.

The best commercial solution may not be the largest building.

Risk-Adjusted Value Matters

Property development decisions should consider:

Potential return × probability of achieving it.

An ambitious scheme with severe legal risk may be less attractive than a slightly smaller but more deliverable development.

Do Not Forget the Exit

Future buyers may ask what rights-of-light work has been undertaken.

Good records can help demonstrate that the issue was properly considered.

Keep Reports and Correspondence Organised

The development file may include:

• Survey reports
• Legal advice
• Design assessments
• Insurance documentation

These can be important during refinancing or sale.

Buyers of Completed Developments May Still Ask Questions

A sophisticated purchaser may want to understand whether there are unresolved neighbouring claims.

Resolving issues properly can therefore support the eventual exit.

Neighbour Relationships Matter Commercially

Development takes place in a real environment.

An aggressive approach to neighbouring owners can create:

• Delay
• Cost
• Conflict

A carefully managed professional approach can sometimes produce better outcomes.

But Do Not Agree Payments Without Advice

Negotiations can have significant legal and valuation consequences.

Use appropriate specialists.

Rights-of-Light Surveyors and Solicitors Have Different Roles

The surveyor may advise on:

• Technical impact
• Development envelope
• Valuation implications

The solicitor advises on legal rights and legal strategy.

Both may be needed.

The Architect Has Another Role

The architect can use technical findings to explore design solutions.

Successful risk management can therefore require a multidisciplinary team.

Commercial Agents Can Contribute Market Evidence

If rights-of-light constraints reduce the proposed development size, the investor may need to reconsider:

• Unit sizes
• Rental assumptions
• Occupier demand

Commercial market advice helps translate the technical change into financial implications.

Example: Industrial Redevelopment

Imagine an investor buys:

A 1-acre commercial site containing an old low-rise warehouse.

The original concept is:

30,000 sq ft of new accommodation.

Early rights-of-light analysis identifies concerns relating to neighbouring buildings.

The design is revised to:

26,000 sq ft.

At first glance, the investor has “lost” 4,000 sq ft.

But if the revised scheme:

• Reduces legal risk
• Simplifies negotiations
• Improves deliverability

it may actually produce the stronger risk-adjusted development.

Maximum Floor Area Is Not Maximum Value

This principle appears repeatedly in commercial property.

The objective is not to squeeze the largest theoretical building onto the site.

The objective is to create the most valuable deliverable scheme.

Build a Development Constraints Register

Before acquiring development property, list potential constraints such as:

• Planning
• Title
• Access
• Utilities
• Rights of light

Then assign each:

Low / Medium / High investigation priority.

This creates a disciplined process.

Update It Throughout Due Diligence

As investigations progress, risks can be:

• Resolved
• Reduced
• Escalated

The acquisition decision should reflect the updated picture.

Do Not Let One Attractive Drawing Dominate the Investment Decision

Concept drawings can make development look easy.

But drawings do not automatically prove:

• Planning
• Legal rights
• Technical feasibility

Every major assumption needs testing.

Ask the Right Question Before Buying

Not:

“Could we draw a bigger building here?”

But:

“What development can we realistically deliver after considering all material constraints?”

That is a much stronger investment question.

Citrus Commercial Circle’s Market Insight

At Citrus Commercial Circle, we believe development potential should always be treated as something to investigate, not something to assume.

A commercial property may appear to have obvious:

• Airspace
• Yard development
• Extension potential

But the investment appraisal needs to consider the constraints that could affect that opportunity.

Rights of light are a good example.

They may not be obvious during a property viewing.

Yet where significant redevelopment is proposed, they can have material implications for:

• Design
• Cost
• Timing
• Viability

The earlier those issues are understood, the more options the investor retains.

Final Thoughts

Rights of light can be easy to overlook when buying commercial development property.

The investor naturally focuses on:

• Purchase price
• Planning
• Construction cost
• End value

But private property rights can influence what is actually deliverable.

A development may have planning support and still require separate consideration of neighbouring rights.

That is why rights-of-light investigation should take place early where the proposed scheme could materially affect neighbouring buildings.

The objective is not to find reasons not to develop.

It is to understand the constraints before committing substantial capital.

Because the strongest commercial property investments are not based on the biggest theoretical development.

They are based on the strongest deliverable development.

At Citrus Commercial Circle, we help investors and developers across Bury and North Manchester identify commercial property opportunities, understand market demand and evaluate the commercial potential of development and value-add assets.

Based in Bury. Active across North Manchester. Always on your side.

Call us today: 0161 383 1806

Email: info@citruscommercialcircle.co.uk

Visit: citruscommercialcircle.co.uk

Let’s unlock the full potential together.

Citrus Commercial Circle – Where standards meet success.