Marriage Value on Short Leases How the 80 Year Rule Costs You

If you own a leasehold flat, or you're buying one, the length of the lease is one of the most important numbers in the whole transaction. Lenders get nervous below around seventy years. Estate agents will tell you it affects saleability. But the really sharp financial cliff edge sits at eighty years, and it comes down to something called marriage value.

Below eighty years, the law requires you to share a chunk of the value you create by extending the lease with your freeholder. Above eighty years, you don't pay that at all. That single rule can add tens of thousands of pounds to the cost of an extension, sometimes more. It's not a technicality. It genuinely changes the maths.

So if you're looking at a flat with a lease sitting at, say, seventy-eight years, you need to understand this before you make an offer. And if you already own a flat that's ticking down towards eighty, you need to understand it urgently.

The phrase sounds almost romantic. It isn't. Marriage value is the extra value created when a short lease and the freehold are, in effect, brought together through an extension. The idea is that a flat with a long lease is worth more than a flat with a short one, and extending the lease is what unlocks that extra value.

The law, under the Leasehold Reform Housing and Urban Development Act 1993, says that once the lease is below eighty years, the freeholder is entitled to at least fifty percent of that marriage value. That's the statutory minimum split. In practice, the valuation is done by surveyors arguing over the numbers, but the freeholder's share of marriage value is never less than half.

Above eighty years, marriage value is legally treated as zero, so it simply doesn't appear in the calculation. That's why the drop below eighty years can feel like falling off a cliff.

Whether your lease is above or below eighty years, the premium you pay to extend it has three components. Understanding each one helps you see where the extra cost comes from.

First, there's the ground rent capitalisation. This is the present value of all the ground rents the freeholder would have received over the remaining lease term. If your ground rent is low and the lease still has a decent chunk left, this figure is often fairly modest.

Second, there's the reversion value. This is the present value of the freeholder getting the property back at the end of the lease. On a very short lease this can be significant, because the freeholder isn't waiting as long. On a lease with sixty or seventy years left, it's a real number. On a lease with a hundred and twenty years left, it's tiny.

Third, and only when the lease is below eighty years, is the marriage value. This is added on top of the first two figures, and the freeholder gets at least half of it. That's the bit that stings.

Here's where it gets a bit technical, but stick with me because this is the part that actually affects your wallet.

To work out marriage value, a surveyor first establishes two things. The value of the flat as it stands today, with its short lease. Then the value of the flat once the lease has been extended to a standard long term, typically ninety years added to the unexpired term, with a peppercorn ground rent.

The difference between those two figures is the marriage value. The freeholder is then entitled to at least fifty percent of that difference.

So imagine a flat that's worth two hundred and fifty thousand pounds with a seventy-five year lease, and three hundred thousand pounds once the lease is extended. The marriage value is fifty thousand pounds. The freeholder's minimum share is twenty-five thousand pounds, and that gets added to the rest of the premium. You can see immediately why this matters.

The actual figures depend entirely on the property, its location, the unexpired term, the ground rent, and the assumptions the surveyors use for yield rates and discount rates. This is why you absolutely need a specialist leasehold surveyor to advise you, not just any valuer.

Every year you wait, two things happen. The lease gets shorter, which increases the reversion value and makes the flat harder to sell and mortgage. And if you're already below eighty years, the marriage value calculation shifts too, because the gap between the short-lease value and the extended-lease value tends to widen as the lease gets shorter.

There's also a practical problem. If you want to sell and the buyer needs a mortgage, most lenders want at least seventy to seventy-five years on the lease at the point of completion. Some want more. If your lease is ticking towards that zone, you may find yourself forced to extend in a hurry, which weakens your negotiating position with the freeholder.

The sensible move, if you own a leasehold flat, is to start thinking about extending when the lease still has around eighty-five to ninety years left. You avoid marriage value entirely, you have time to negotiate properly, and the premium is almost always lower.

If you're a first time buyer looking at a flat with a lease below eighty years, don't just walk away automatically. But do go in with your eyes open.

Get a specialist leasehold surveyor to give you an estimated premium before you exchange. This is called an informal valuation and it's money well spent. Factor that estimated cost into what you're willing to pay for the flat. If the seller won't reduce the price to reflect the extension cost, think hard about whether the deal still makes sense.

Also check whether the seller is eligible to extend under the statutory route. To use the Leasehold Reform Act, the leaseholder generally needs to have owned the flat for at least two years. If they haven't, they can't serve the formal notice, though they may be able to assign the right to you as part of the sale. Your solicitor needs to look at this carefully.

And do check the ground rent terms. Some older leases have doubling ground rent clauses that create their own separate problems with lenders. Short lease plus problematic ground rent is a combination worth being very cautious about.

Leasehold valuation is genuinely specialist work. A good leasehold surveyor will know the local comparable evidence, understand how tribunals approach yield rates in your area, and be able to give you a realistic range for the premium rather than a vague guess.

The Association of Leasehold Enfranchisement Practitioners, known as ALEP, is a good starting point for finding qualified professionals. Your solicitor should also have experience in leasehold enfranchisement specifically, not just conveyancing generally. There is a real difference.

If you and the freeholder can't agree on a premium, either side can apply to the First-tier Tribunal, which will determine a fair figure. Most cases settle before they get there, but knowing that route exists gives you leverage in negotiations.

Marriage value isn't a trap designed to catch you out. It's a legal mechanism with a specific logic. But it is a real and significant cost, and the more clearly you understand it before you commit to a purchase or an extension, the better placed you'll be to make a smart decision.