Title Splitting: Why Your Company Structure Could Cost You Tens of Thousands

Title splitting can unlock serious value from multi-unit blocks — but get the company structure wrong and you could hand the entire uplift straight back in stamp duty. Mark breaks down what investors need to know before they start.

What Is Title Splitting?

If you buy a property made up of multiple units — a block of flats, or a shop with flats above it — there can be a real advantage to splitting it into individual titles and securing separate mortgages on each one. It doesn't work on every property. Converted houses and townhouses (unless they're substantial period conversions) tend not to suit it well. Purpose-built blocks work best, and shops with flats above can work too, though a low-value commercial unit on the ground floor can create its own mortgage complications.

Why Investors Do It

The main driver is value. A property sold as a single block usually carries a discount, because the pool of buyers is smaller — largely limited to investors who need the numbers to stack up. Split that block into individual titles and you open the market up to standard homeowners, who buy on very different criteria: affordability and emotion, not yield.

That gap can be significant. Mark is currently working on a 14-flat block bought for £900,000. Once split into 14 individual titles with individual mortgages, the aggregate value comes to £1.3 million — a substantial uplift for what is largely a paper-based restructuring exercise, with only limited refurbishment involved.

The Practical Downsides

It's not without friction. Splitting a commercial unit on the ground floor can leave you with a low-value asset that struggles to meet a lender's minimum loan size — typically £150,000 plus, meaning the property itself needs to be worth £200,000 or more to secure a 75% LTV mortgage through mainstream lenders.

Dealing with multiple lenders is the other major challenge. On the 14-flat deal, different lenders have applied different underwriting requirements — one has been straightforward, another has focused heavily on source of wealth, tracing funds back to a purchase that happened nine months ago. Each mortgage moves at its own pace, yet all need to complete on the same day, which becomes a logistical challenge, especially as rates shift and lenders respond differently to those changes.

Splitting on Purchase vs Splitting Later

There are two distinct scenarios, and they're treated very differently in mortgage terms.

If you split the titles at the point of purchase — for example, buying with bridging finance and splitting immediately — refinancing afterwards is treated as a straightforward remortgage, because the titles already exist as separate entities.

If you buy the block first and decide to split later, you have to grant new leaseholds on each unit to another entity. That transaction is treated as a purchase, not a remortgage, which brings company structure sharply into focus.

The Stamp Duty Trap

This is where it gets expensive if you get it wrong. When you split titles, you end up with a freehold and a series of leasehold properties — and the freeholder and leaseholder cannot be the same person or entity.

Typically, a "Topco" buys the block. To split the titles, the leaseholds are sold down to a subsidiary entity — a purchase, requiring its own purchase mortgage. If that subsidiary has no group relationship to Topco, the transaction can trigger stamp duty, which can wipe out most or all of the value uplift you were trying to capture.

Structure it correctly, however — with the subsidiary owned 100% by Topco as part of a group structure — and the same transaction is exempt from stamp duty. It's still a purchase, still needs a normal purchase mortgage, but the tax exposure disappears entirely. Two nearly identical transactions, two very different tax outcomes.

There's a similar consideration once titles are already split: rather than moving the leaseholds into a new entity, you can instead remortgage the leaseholds where they sit and move only the freehold out. Since the freehold is typically worth far less than the combined leasehold properties, any stamp duty exposure on that route is much smaller.