What Every Homeowner Should Know
Let’s get real for a second. No one likes thinking about disaster scenarios – fires, floods, structural collapses – but if you own a home, you owe it to yourself to be prepared. That starts with something most people have never even heard of until it’s too late: a Reinstatement Cost Assessments (RCA).
An RCA isn’t about how much your house would sell for. It’s not about how much you paid for it, either. It’s all about how much it would cost to rebuild your home – brick by brick – if the worst happened.
And trust me, getting this wrong can cost you. Literally.
What Are Reinstatement Cost Assessments?
In plain English? Reinstatement cost assessments tells you how much it would cost to rebuild your property from the ground up using current materials, labour rates, and professional fees.
Unlike your home’s market value – which is affected by location, trends, and demand – the reinstatement cost focuses purely on the physical structure. We’re talking walls, roof, windows, plumbing, electrics… even the kitchen sink.
An accurate RCA helps ensure your building insurance valuation is spot on, so you’re not caught short in an emergency.
Why You Need One – Like, Yesterday
Still not convinced? Here’s why reinstatement cost assessments matters more than you might think.
1. Avoiding the Underinsurance Trap
Too many homeowners are unknowingly underinsured. That means your insurance payout could fall way short of what you actually need to rebuild. Imagine losing 30% of your claim just because your valuation was outdated. Ouch.
2. The “Average Clause in Insurance” – A Hidden Sting
Many insurers enforce something called the Average Clause. If your home is underinsured by 25%, they’ll reduce your payout by the same amount – even if your claim is relatively small.
So, say your rebuild cost is £300,000 but you’ve only insured it for £225,000. If you claim for £50,000 in damage, your insurer might only pay £37,500. That’s a hefty shortfall.
3. Rebuild Costs Keep Climbing
Inflation, global supply chain chaos, Brexit, labour shortages… The construction industry’s had a rough few years. All of this drives up rebuild costs, which is why your RCA from 2018 may already be out of date.
What’s Included in a Rebuild Valuation Survey?
A rebuild valuation survey – which forms the basis of an RCA – isn’t just a rough estimate pulled from the air. Qualified surveyors will evaluate:
- The size and footprint of your property
- Age and type of construction materials used
- Architectural design or unique features
- External buildings (think: garages, garden offices, annexes)
- Location-specific rebuild factors (e.g., access issues, listed status)
They also factor in site clearance, professional fees (like architects or structural engineers), and even VAT where applicable.

Building Insurance Valuation vs. Market Value: What’s the Difference?
Here’s where people often get tripped up. Let’s say your home’s worth £500,000 on the open market. That might sound like a good number to insure it for – but it’s completely irrelevant in this context.
Why? Because your building insurance valuation is based on rebuild costs, not resale value. Depending on your location and the style of your property, that rebuild cost could be significantly less – or, in the case of period homes or bespoke builds, way more.
Moral of the story? Don’t just copy your market value into your insurance form. Get it properly assessed.
Questions People Often Ask (Yes, You’re Not Alone)
Q: How often should I update my reinstatement cost assessment?
Ideally every 3-5 years – or immediately after major renovations. New kitchen? Loft conversion? You’re going to need a fresh survey.
Q: Can’t I just use an online calculator?
You can, but should you? These tools are handy for rough ballpark figures, but they can miss important details – like heritage features, unusual layouts, or regional construction costs. For peace of mind, a qualified chartered surveyor is your best bet.
Q: Is it expensive to get a professional assessment?
Not compared to the potential financial loss from being underinsured. Most surveys cost a few hundred pounds. Compare that to a potential six-figure rebuild claim and it’s a no-brainer.
When Should You Be Most Concerned?
Let’s be honest – not everyone needs an urgent RCA. But certain situations make it especially important:
- You’ve recently renovated or extended your property
- You live in a listed or historic building
- You own a custom-built or architect-designed home
- Your current policy hasn’t been updated in years
- You’re switching insurers and want an accurate baseline
If any of the above apply to you, it’s time to book a survey.
How to Book a Reinstatement Cost Assessment
Most independent surveyors and specialist firms offer this service. Look for someone regulated by the Royal Institution of Chartered Surveyors (RICS). They’ll often use the BCIS (Building Cost Information Service) to calculate figures, which is widely accepted by insurers.
Be prepared to share floor plans, renovation details, or any previous assessments you may have. The more accurate the info, the better your valuation.
Need More Support?
If you’re navigating property planning, insurance policies, or rebuild logistics, you don’t have to go it alone. Resources like Planning for People can help guide you through the technical side of property ownership – especially when the jargon starts to get overwhelming.
Before You Close That Browser Tab…
We know it’s not glamorous. You’d probably rather be looking at paint swatches or garden furniture than digging through insurance documents.
But taking an hour to sort out your reinstatement cost assessment could save you thousands down the line. And it’s not just about money – it’s about making sure your home, your sanctuary, is fully protected, no matter what life throws your way.
To find out more about reinstatement coss assessments visit Exactum.co.uk
Disclaimer:
This content is intended for informational purposes only and does not constitute legal or insurance advice. Always consult a qualified professional for personalised guidance on your reinstatement cost or building insurance coverage.