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If your business trades from a converted mill or an ageing industrial unit in Blackburn, the standard package answers are not good enough. Tell us about the building and we'll arrange cover that actually fits it.
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Reviewed by Apex Insurance Brokers · Last reviewed 2026-08-08
A lot of business insurance content reads as if every firm trades from a modern unit on a new-build estate. Blackburn is not that town. It grew on cotton weaving, and the buildings that industry left behind — multi-storey brick mills, weaving sheds, and the ageing industrial stock that filled in around them — are still where a large share of the town's businesses actually work. Some have been converted into workshops, studios, gyms, storage and small manufacturing units; others are simply old buildings that have been patched and re-let for decades. That building stock is the single biggest thing that makes insuring a Blackburn business different, and it is worth taking seriously before renewal rather than after a claim.
If you occupy space in a converted mill or a Victorian industrial building, three things matter to an insurer that would barely register on a modern unit.
First, construction. Solid brick or stone walls, timber floors — in older mills often floors that spent a century soaking up machine oil — large open floor plates and original roof structures all affect how a fire behaves and how the building is rated. If your proposal form just says “brick built, standard construction” and the reality is a 19th-century mill floor, you have a disclosure problem waiting to surface at claim time.
Second, services. Ageing industrial buildings frequently carry ageing electrics, old heating plant and, in some cases, no sprinklers in spaces originally designed around them. Insurers increasingly ask for electrical inspection certificates (EICR) on older commercial buildings and may impose conditions — a warranty requiring a satisfactory inspection, for example. Breach a warranty like that and a fire claim can fail entirely. Know what conditions sit on your policy; do not just file the schedule.
Third, water. Big old roofs with valley gutters, and pipework that has been extended and re-routed through decades of partial conversions, make escape of water and storm damage a genuine feature of this stock. Check the excesses that apply specifically to those perils — they are often higher than the standard policy excess, and that is exactly where older buildings claim.
Underinsurance is the most common serious defect we see on property policies for older buildings, and mill-town stock is where it bites hardest. The market value of an ageing industrial building in Lancashire can be modest; the cost of reinstating solid brick construction, heavy timber floors and period detailing to modern standards is anything but. Where a building carries listed status or sits in a conservation area, reinstatement can be constrained in materials and method, pushing the true rebuild figure further still from anything resembling the purchase price.
If your sum insured is based on what you paid, or on a figure rolled forward from year to year with index-linking doing all the work, the “average” clause in most commercial property policies will proportionately reduce any claim — including partial losses. Insure a building at half its rebuild cost and a £100,000 roof claim can be paid at £50,000. For owners and for tenants responsible for insuring under their lease, a proper reinstatement cost assessment on this kind of building is one of the cheapest pieces of risk management available.
The same logic applies to business interruption. Rebuilding or repairing a Victorian mill structure — sourcing matching brick, dealing with structural engineers, satisfying planners — takes longer than throwing up a steel portal frame. A 12-month indemnity period is frequently too short for businesses in this stock; 24 or 36 months is often the realistic figure.
Converted mills are usually multi-tenanted, and your risk is only partly your own. An underwriter looking at a unit in a subdivided industrial building will want to know who else is in it — a joinery workshop, a vehicle repairer or a fabric wholesaler two floors down changes your fire exposure whether you like it or not. Expect questions about fire separation between units, shared alarm systems, and how waste is stored in common areas.
Two practical points follow. Answer the “adjoining occupiers” questions honestly and specifically, because vague answers become non-disclosure arguments later. And read your lease against your policy: many leases in converted buildings make the landlord responsible for insuring the structure while you insure tenant's improvements, stock and contents — but the boundary between the two is where gaps live. If you have fitted out your unit, those improvements are your problem to insure, not the landlord's.
For trades working across the town's older buildings — electricians, joiners, heating engineers — there is a further point: tool theft from vans and from part-occupied industrial sites is a persistent exposure, and tools cover usually carries overnight and unattended-vehicle conditions that need reading before you rely on them.
One piece of firm ground: if you employ anyone, including casual or part-time staff, Employers' Liability insurance is a legal requirement under the Employers' Liability (Compulsory Insurance) Act 1969. Public Liability, by contrast, is not required by law for most businesses — but in practice it is demanded by landlords, main contractors and local authority contracts, and for anyone dealing with the public it is the cover most likely to be tested. Manufacturing and engineering businesses, which Blackburn still has, should look equally hard at Products Liability and at whether machinery is properly covered for breakdown as well as damage.
To be clear about who we are: Apex Insurance Brokers Limited is based in Bristol and does not have an office or team in Blackburn. We arrange commercial insurance for clients across the UK, and buildings like Blackburn's are exactly why a broker earns their keep — presenting non-standard construction properly to insurers, challenging inadequate sums insured, and reading warranties before they become claim declinatures. Most of that work happens by phone, email and document anyway; what matters is that whoever arranges your cover understands the building you are actually in. You can read more about how we work with businesses generally on our commercial insurance page.
Apex Insurance Brokers Limited is authorised and regulated by the Financial Conduct Authority (FRN 724952). This article is general information, not advice on a specific policy.
