Comparison Guide Β· Updated July 2026
Part-Exchange vs Selling on the Open Market 2026
Part-exchanging your home directly to a new-build developer offers speed and chain-free certainty, but typically values your home 5β10% below open-market price. Selling on the open market usually achieves a higher price but takes longer and carries chain risk. Weighing the discount against the certainty and speed is the key decision for movers considering a new-build purchase in 2026.
TL;DR
- Part-exchange: Fast, chain-free, developer buys directly; typically 5β10% below open-market value; no estate agent fee
- Open market sale: Usually achieves full market value; slower; chain risk; estate agent fee applies
Side-by-Side Comparison
| Feature | Part-Exchange | Open Market Sale |
|---|---|---|
| Price achieved | Typically 5β10% below open-market value | Full negotiated market value |
| Speed | Often weeks once terms agreed | Typically several months |
| Chain risk | None β developer buys directly | Yes, unless selling to a cash/chain-free buyer |
| Estate agent fee | Usually none | Typically 1β2% + VAT of sale price |
| Availability | Only via new-build developer schemes | Any property, any buyer |
| Certainty of completion | High, once accepted | Lower β buyers can withdraw at any stage |
How Part-Exchange Works
Under a part-exchange scheme, a new-build developer arranges for their own surveyor to value your current home, then offers to buy it directly, using the agreed value against the price of a new-build property in one of their developments. This avoids the need to market your property, negotiate with private buyers, or risk being part of a chain that could collapse. In exchange for this certainty and speed, developers typically discount the valuation by around 5% to 10% compared with likely open-market achievable price, to cover their own resale costs and risk.
How Selling on the Open Market Works
Selling on the open market means instructing an estate agent (or selling privately) to find a buyer at the best achievable price through marketing, viewings and negotiation. This route typically achieves a higher sale price than part-exchange, since you are not accepting a discount for certainty, but it takes longer β often several months from listing to completion β and carries the risk of the chain collapsing at any point if your buyer, or someone further along the chain, pulls out.
Worked Example β Β£300,000 Home
| Route | Approx. Net Proceeds | Typical Timeframe |
|---|---|---|
| Part-exchange (8% discount, no agent fee) | Β£276,000 | Weeks |
| Open market (full value, 1.5% + VAT agent fee) | ~Β£294,600 | Several months |
Illustrative example only β actual part-exchange discounts and estate agent fees vary by developer, region and negotiation.
Which Should You Choose?
Part-exchange suits sellers who prioritise speed, certainty and avoiding the stress of a property chain, particularly when buying a specific new-build home with a limited reservation window, and who are comfortable accepting a lower net price for that convenience. Selling on the open market suits sellers who are not under time pressure, want to maximise sale proceeds, and are willing to accept the chain risk and longer timeline that comes with it. Getting an independent estate agent valuation alongside any part-exchange offer is the best way to quantify exactly what the convenience is costing you.