Whether you are a developer, investor, landlord or even an SME wanting to expand your operations, buying land or buildings for development can give you a considerable commercial advantage. However, as with any big business decisions, it comes with certain risks and knowing your legal obligations is vital. To make the process run as smoothly as possible and stay within both time and budget limits, you need to understand the legal implications and ensure you carry out a thorough risk assessment.

Here we outline the key legal considerations every buyer should be aware of before committing to the purchase of a development site.

1. Title and Ownership: Start with Certainty

Before committing to a purchase you should carry out a full title investigation. Your solicitor will review the title documents to identify:

  • Who owns the land and confirmation of their right to sell it
  • Any restrictions on use, such as covenants limiting building types or density
  • Easements, including rights of way or rights of access for neighbouring land
  • Overage or uplift clauses that require a future payment upon development
  • Boundary issues, which often arise later if not resolved at the outset

For example, we often see older industrial sites still subject to 19th‑century covenants which restrict use to “manufacturing purposes”. These can prevent sites from being used for residential or mixed‑use schemes unless removed or insured against.

2. Planning Status and Development Potential

Before buying, a detailed planning appraisal is crucial.

Check existing permissions

  • Is there an existing planning permission that can be implemented?
  • Are there reserved matters or pre‑conditions still to be discharged?

Assess planning risk

  • Does the local authority’s Local Plan support your intended use?
  • Are there constraints such as conservation areas, listed buildings, or protected trees?
  • Would the development trigger Section 106 obligations or CIL (Community Infrastructure Levy) charges?

A simple change of use application can be straightforward under permitted development rights, but larger schemes require early planning strategy to avoid costly redesigns or delays.

3. Environmental and Contamination Issues

Environmental due diligence is non‑negotiable for any development purchase, particularly for former industrial or brownfield land.

Typical investigations include:

  • Phase 1 Environmental Assessment
  • Ground investigation surveys
  • Flood risk reports
  • Asbestos surveys (where buildings are present)

Under the Environmental Protection Act 1990, landowners can be held liable for contamination even if they did not cause it. By knowing the site’s condition at the start of the purchase process, it allows buyers to negotiate price, secure indemnities, or arrange remediation plans.

4. Access, Highways and Infrastructure

A site may look suitable for development, but it needs to have secure access and adequate services, in order for it to be a success.

Key points include:

  • Adopted vs unadopted roads: who maintains the access?
  • Visibility splays and highway safety requirements for new entrances
  • Capacity of water, electricity, gas and drainage connections
  • Whether upgrades require third‑party agreements or easements

Developers frequently encounter last‑minute issues where access crosses private land. Reviewing these points early on allows buyers to avoid disputes or expensive renegotiations later in the build process.

5. Existing Occupiers and Vacant Possession

If the property is currently let or occupied, buyers need to clarify:

  • Type of occupation (tenancy, licence, informal arrangements)
  • Notice periods and termination rights
  • Whether tenants have statutory rights, such as security of tenure under the Landlord and Tenant Act 1954

6. Conditional Contracts and Option Agreements

Development purchases often use more flexible structures such as:

  • Conditional contracts: exchanging now, completing once planning is granted
  • Option agreements: giving a developer the right (but not obligation) to buy at a later stage, securing the land and allowing planning permission to be submitted.
  • Joint Venture Agreements: allowing parties to work together on a project
  • Promotion agreements: where a landowner and promoter collaborate to secure planning

These can be beneficial from a commercial perspective but require precise drafting to avoid disputes over timeframes, costs and planning strategy.

7. Funding and Lender Requirements

If you are using development finance, your lender will expect:

  • A clear and marketable title
  • Robust planning permission
  • Satisfactory environmental reports
  • A viable development appraisal

Development lenders often impose more conditions than standard mortgage providers, and if delays arise, they are usually because legal issues have not been identified early in the purchase process.

8. Surveys and Technical Due Diligence

In addition to legal investigations, buyers should ensure they have:

  • A full building survey (for existing structures)
  • Topographical and measured surveys
  • Utilities mapping
  • Archaeological or ecological surveys, if required for planning

These technical reports feed directly into costings for the build and planning applications, therefore reducing risk for both developer and lender.

Early Legal Advice Saves Time, Money and Stress

Buying property or land for development presents exciting commercial opportunities, but it also carries significant legal and practical challenges. Identifying issues early allows you to plan effectively, manage risk and avoid costly delays once construction begins.

At Ison Harrison Solicitors our Commercial Property team advises developers, investors, landowners and SMEs across England and Wales. We provide clear, practical guidance on all aspects of development transactions.

If you are considering purchasing land or buildings for development, we are here to help.
Contact us for a no‑obligation consultation to discuss your project and how we can support its success. Call us on 0113 284 5000 or email commprop@isonharrison.co.uk