What does sold subject to contract mean on a flat listing?

Sold subject to contract, or SSTC, means the seller has accepted an offer and the agent has taken the flat off the active market. That's it. Nobody has signed anything binding.

In England and Wales, a sale isn't legally committed until contracts are exchanged. Until that moment, the buyer can walk away and so can the seller. No penalty, no come-back. The word "sold" on a portal is doing a lot of heavy lifting, because it really means "sold in principle".

That gap between a handshake deal and exchange can last weeks or months. Flats tend to sit at the longer end, for reasons we'll get to.

The two terms get used interchangeably, and agents aren't consistent. Broadly, they both mean an offer has been accepted and the legal work is either starting or underway.

Some agents use "under offer" for the early stage, when an offer's been accepted but the buyer's finances haven't been checked. They then switch to SSTC once the buyer has been verified and solicitors are instructed. Others do the reverse, or use one label throughout. There's no rule.

So don't read too much into the wording. Ring the agent and ask what stage the sale has reached. That tells you far more than the label ever will.

Yes. Legally, you can. The seller isn't bound to the first buyer, and the agent has a duty to pass on every offer to the seller, whether the property is marked SSTC or not.

Whether you should is a different question. A few things to weigh up.

1. Ask how far along the sale is. A buyer with a mortgage offer, a survey done and searches back is a long way down the road. One who offered last week is not.

2. Expect to pay more, or to match the accepted price at the very least. A lower offer is unlikely to get a look in.

3. Think about the seller's view. Many won't risk a sale that's progressing, especially in a chain.

4. Be ready to move fast. If you're a cash buyer or have a mortgage agreement in principle and a solicitor lined up, say so. It can genuinely tip things.

There's also the ethical side. Gazumping is legal, but it's unpleasant, and you might be on the receiving end later. That's your call. Just know that it's allowed.

Any sale can collapse, but flats have a few extra weak points, mostly tied to the lease.

A short lease is the big one. Lenders commonly want around 70 to 85 years left when you apply, and 30 to 40 years left when the mortgage ends, though each lender sets its own figure. If the lease is shorter than that, the buyer's mortgage can be refused, and the sale stalls.

Extending a short lease isn't cheap. Marriage value still applies when a lease with fewer than 80 years left is extended. The Leasehold and Freehold Reform Act 2024 abolishes it, but that part isn't in force and has no start date. So a lease dipping under 80 years can cost noticeably more to fix.

Other common culprits include the following.

1. Survey or valuation problems, such as the lender valuing the flat below the agreed price.

2. Slow management company paperwork. Flats need a leasehold information pack, and managing agents can take ages to supply it.

3. Service charge or major works surprises, like a big bill for a roof or cladding that appears in the paperwork.

4. Ground rent terms that a lender or buyer won't accept.

5. Chain trouble. One broken link upstairs or downstairs can bring everything down.

6. Buyers simply changing their minds, or their finances.

When a sale collapses, the agent relists the flat, often with a quiet "back on the market" tag. It doesn't always mean something's wrong with the property. Sometimes it's the buyer's mortgage, or a chain.

But it's worth asking why. A reputable agent should tell you, within reason. If the answer is a down-valuation, a lease problem or a survey issue, you want to know before you spend money on your own.

A flat that's fallen through can be a chance too. The seller's often keener, more flexible on price, and wary of another delay. A buyer who's ready to go, with finance sorted, is in a strong spot.

Before you commit to a flat, SSTC or not, do some homework on the lease. HM Land Registry's free property search shows only whether a property is freehold or leasehold and its title number. To see more, it charges 7 pounds to download the title register, the title plan or a copy of the filed lease on gov.uk. That's cheap for what it tells you.

Look for the lease length, ground rent and how it changes. New long residential leases granted from 30 June 2022 carry a peppercorn ground rent under the Leasehold Reform (Ground Rent) Act 2022, but older leases can be very different.

If you're thinking of extending a lease later, note that the old rule requiring two years of ownership before a statutory claim was abolished from 31 January 2025. Leasehold law is changing though, so confirm anything that affects your costs with a solicitor before you rely on it.

And instruct that solicitor early. Slow conveyancing is a major reason flat sales wobble.