Selling a house on the open market can take months. You’ll deal with estate agents, viewings, chains and the very real chance that the whole thing collapses before completion. Part exchange offers a shortcut: you trade your current home directly to a developer as partial payment for your new one.
No chain, no buyer to chase, no fall-throughs. The catch? You won’t get full market value. So is the trade-off actually worth it? We’ll walk you through exactly how part exchange works, what it’ll cost you in real terms and when the speed and certainty make it the smarter option.
How Part Exchange Works Step by Step
The process is more simple than most people expect. You find a property you want to buy from a developer who offers a part exchange scheme. The developer then arranges for independent estate agents, usually two or three, to value your current home. Based on those valuations, the developer makes you an offer.
If you accept, the developer buys your home and deducts its agreed value from the price of the new property. You pay the difference through savings, a mortgage or a combination of both. The two transactions happen at the same time, so you move out of your old home and straight into the new one on the same day.
The whole thing can complete in as little as five to ten weeks, compared to the five months or more a typical open market sale takes.
What You’ll Actually Get Offered
This is where it gets honest. Developers will usually offer somewhere between 85% and 95% of your home’s surveyed market value. Some sources put the range lower, at 80% to 90%, depending on condition, location and how easy the property would be to resell.
On a home valued at £300,000, a 10% discount means you’re leaving £30,000 on the table. That’s a big number. But it doesn’t tell the full story until you factor in what an open market sale actually costs.
A Worked Example: Part Exchange vs Open Market
Say your home is worth £300,000 and the developer offers you £270,000 through part exchange, a 10% discount.
If you sold on the open market instead, you’d pay estate agent fees of around 1.2% plus VAT (roughly £4,320), solicitor fees of £1,000 to £1,500, an EPC certificate and various smaller costs. That adds up to around £5,500 to £6,500 in fees alone.
And then there’s the risk. Around one in four agreed house sales in the UK fell through before completion in 2025. If yours collapses, you’re back to square one with months of wasted time and potentially thousands in sunk costs.
So the real gap between part exchange and an open market sale isn’t £30,000. Once you subtract fees and account for the risk of a failed sale, it’s closer to £20,000 to £23,000. That’s still significant, but the certainty and speed of part exchange changes the calculation for a lot of people.
Who Offers Part Exchange and How Terms Differ
Most of the big volume housebuilders run part exchange programmes. Barratt Homes, Taylor Wimpey, Persimmon and Bellway all have established schemes, each with slightly different rules. A common requirement is that your current home needs to be worth no more than 70% to 80% of the new build you’re buying. That means part exchange is traditionally designed for people upgrading to a more expensive property.
Part Exchange for Downsizers
Here’s where things have shifted in recent years. Part exchange used to be almost exclusively for upsizers, but specialist developers have started offering it to people moving in the other direction.
Park bungalow developers like Regency Living offer part exchange schemes specifically for downsizers. If you’re selling a larger family home and moving into a smaller, lower-maintenance property, these schemes remove the biggest headache of the process: getting your existing house sold.
For older buyers especially, the appeal often has less to do with squeezing every last pound out of the sale and more to do with removing stress. No viewings, no chain, no waiting for a buyer who might pull out eight weeks in. The developer handles it all, and you get a fixed moving date.
What Developers Look For (and What Gets Rejected)
Developers won’t accept every property for part exchange. They need to resell your home afterwards, so they’ll assess it based on condition, location and how quickly it’s likely to sell. Properties with structural issues, short leases, non-standard construction or a need for major repairs are usually declined.
Most developers will also reject homes that are in areas with low demand or that fall outside a certain price bracket. It’s worth asking early in the process whether your property is likely to qualify, before you invest too much time.
Protect Yourself Before You Accept
Even if part exchange looks like the right move, don’t accept the first offer without doing your homework.
- Get your own valuation first. Have at least two independent estate agents value your home before the developer sends theirs. That gives you a benchmark to compare against.
- Ask what the new property would cost without part exchange. Some developers bundle the discount into the new build price, so make sure you’re not overpaying on the purchase side as well.
- Read the terms carefully. Some schemes charge additional fees or require the property to be left in a specific condition. One developer charges £500 upfront, refundable only if the property passes a condition check.
- Check the SDLT position. Stamp duty still applies on the full purchase price of the new property, and if you own additional properties, the 5% surcharge could apply too.
When Part Exchange Makes Sense (and When It Doesn’t)
Part exchange is worth serious consideration if you’re in a chain that keeps collapsing, if your property is the type that sits on the market for months or if the speed and certainty of the move matters more to you than maximising the sale price. For downsizers, retirees and anyone who’s already found the home they want and doesn’t want to risk losing it, part exchange can be the most practical route.
It’s less suitable if you’re in no rush, your home is in a strong market and likely to sell quickly, or if the gap between the developer’s offer and what you could realistically achieve privately is too wide to justify.
Is the Trade-Off Worth It for You?
Part exchange isn’t free money and it isn’t a con. It’s a trade: you give up some of your home’s value in exchange for certainty, speed and a much simpler process. The key is knowing exactly what you’re giving up.
Get your own valuations, do the maths properly and don’t let the convenience blind you to a lowball offer. For the right buyer in the right situation, it’s one of the most stress-free ways to move home in the UK.
