Commercial Property Due Diligence UK: Full Guide

Overview

Due diligence in commercial property is the investigative stage that sits between agreeing heads of terms and exchanging contracts. It brings together three broad workstreams: financial, legal, and physical. The financial side examines rental income, service charge recovery, tenant covenant strength, voids, and the numbers behind the agent's marketing pack.

The legal side looks at title, tenure, easements, covenants, planning, environmental matters, and the terms of any existing leases. The physical side covers the building itself: structure, services, fire safety, EPC rating, asbestos, and any capital expenditure you are likely to inherit.

Each workstream is handled by different specialists, typically a solicitor, a building surveyor, and sometimes an accountant or valuer. The purpose is not just to find problems but to price them. A lease with four years unexpired on a single-let property is not a dealbreaker, but it should be reflected in what you pay. Good due diligence turns unknowns into known risks that you can negotiate around, insure against, or walk away from.

Key steps

1. Agree heads of terms and set the due diligence clock. Before instructing professionals, make sure the heads of terms are clear on price, what is included, the exclusivity period, and any conditions. Most commercial deals allow four to eight weeks for due diligence, though complex assets may need longer. Agreeing the timeline up front avoids pressure later when awkward findings appear.
2. Instruct your solicitor to raise pre-contract enquiries and review title. Your solicitor will examine the registered title at HM Land Registry, check for restrictions, easements, and covenants, and raise Commercial Property Standard Enquiries (CPSE.1 and any relevant supplementary forms). They will also review existing leases, licences, rent deposits, and any side agreements. This is where hidden obligations tend to surface.
3. Commission a building survey and specialist reports. A chartered building surveyor will inspect the structure, roof, mechanical and electrical services, and external fabric. Depending on the property you may also need an environmental report, asbestos survey, measured survey, and fire safety assessment. The survey should be scoped to the asset type: an industrial unit and a mixed-use block need very different attention.
4. Verify the income and the numbers behind it. Cross-check the rent roll against the actual leases, look at payment history, review service charge accounts for the last three years, and consider tenant covenant strength. For multi-let buildings, understand the recoverability of service charge items and whether any caps or exclusions leave the landlord exposed. Numbers on a marketing particular are a starting point, not a fact.
5. Consolidate findings and renegotiate or withdraw. Once reports are in, review everything against your original investment thesis. If material issues have emerged, such as a structural defect, a short lease term, or an onerous title restriction, you have three options: renegotiate the price, ask for contractual protections like warranties or retentions, or walk away. Heads of terms are usually not binding, so withdrawal is uncomfortable but possible.

Common questions