Part Exchange House vs Cash Sale: Which Pays You More?

Part exchange pays roughly 80% to 90% of market value but only works if you buy a new build from that developer. A cash sale pays a similar figure with no eligibility rules and no tie to one estate.

Part exchange vs cash sale at a glance

What is part exchange on a house?

Part exchange is an arrangement in which a house builder buys your existing home and deducts its agreed value from the price of a new-build property you are purchasing from them. It is a purchase incentive, not a standalone way to sell.

The mechanics are consistent across the big builders. You reserve a new-build plot, the developer commissions independent valuations of your current home — Barratt Homes states it arranges two independent valuations and prices the offer on a presumed sale within 8 to 10 weeks — and it then makes a single, largely non-negotiable offer. If you accept, both transactions complete on the same day, so you stay in your existing home until the new one is ready.

Because the developer becomes your buyer, there is no chain, no marketing period and no viewings. That is the same structural advantage a genuine cash sale gives you — with one significant difference. Part exchange is only available if you commit to buying a specific new home from a specific builder.

How much do you lose if you part exchange your house?

Expect to give up 10% to 20% of open-market value. On a home worth £250,000 that is £25,000 to £50,000, taken as a lower purchase price rather than as a fee you can see on an invoice.

The discount exists for a reason: the builder is buying an asset it does not want, at its own risk, and will have to resell it on the open market at a cost. That is the same logic that drives how much below market value cash buyers offer. Neither route is a con — you are buying speed and certainty, and both are priced.

Where part exchange is genuinely misleading is the “no estate agent fees” headline. Saving a 1% to 1.5% agent commission is real, but it is dwarfed by a 10% to 20% valuation discount. On that £250,000 home you would save roughly £2,500 to £3,750 in commission while giving up £25,000 to £50,000 in price. The hidden costs of selling with an estate agent are worth counting, but they do not close a gap that size.

Can you part exchange your house? The rules developers actually apply

Most homeowners who ask about part exchange do not qualify. Builders only take properties they are confident of reselling quickly, and they publish value ceilings that rule out a large share of the market.

• A value ceiling tied to your purchase. Taylor Wimpey states the home you part exchange must be worth no more than 70% of the new Taylor Wimpey home you buy. Persimmon applies a comparable 70% to 75% test, and Redrow requires your home to be worth less than the new Redrow home. In practice you must be trading up significantly.
• Lease length. Taylor Wimpey’s terms exclude leasehold properties with fewer than 85 years remaining. Short leases are a common disqualifier across the sector.
• Construction type and condition. Non-standard construction, structural defects, damp and significant disrepair are routinely declined. Builders want a straightforward resale.
• Property type. Flats, shared-ownership homes and properties with Help to Buy or other charges attached are frequently excluded.
• Location and saleability. If the property sits in a slow local market, the developer simply says no.

The double discount nobody mentions: the new-build premium

Part exchange discounts the home you sell and, separately, attaches a premium to the home you buy. New-build homes in Great Britain sold for an average of 30% more than existing homes in 2026, according to research by UK Property Development published on 6 August 2026 — up from an estimated 23.8% a decade earlier.

That premium is not evenly spread. The same research puts it at 60% in the North East, 55.4% in Scotland, 44.7% in Wales, 41.8% in the East Midlands and 28.9% across England as a whole. London is the sole exception, where new builds sold for 10.5% less than existing homes.

So a homeowner in the North East part exchanging a £250,000 house is potentially accepting around £212,500 for it while paying a premium-priced new build on the other side of the same transaction. That is a defensible choice if the new home’s energy efficiency, warranty and low maintenance matter to you — but it should be a choice you make with the numbers in front of you, not an assumption that “no fees” means “no cost”.

Part exchange vs cash sale: how the money compares on a £250,000 home

The headline numbers are closer than most people expect. The real separator is not price — it is whether tying your sale to one builder’s stock suits your move. For a fuller like-for-like on the third column, see our comparison of a cash buyer versus an estate agent.

When part exchange is the better choice

Part exchange wins when you already want a specific new build and your home comfortably clears the developer’s value ceiling. In that situation the scheme is doing real work for you.

• You are trading up and your current home is worth well under 70% of the new one.
• You want the warranty, energy efficiency and low maintenance of a new build enough to accept the premium knowingly.
• Your property is mainstream, freehold, in good order and easy to resell.
• You need to stay put until the new home is finished, and same-day completion matters more than headline price.

When a cash sale beats part exchange

A cash sale wins whenever the purchase side is the problem — which is most of the time. It separates selling from buying, so nothing about your onward move constrains the sale.

• You are not buying a new build. Downsizing, renting, relocating, emigrating or simply cashing in — part exchange is unavailable in every one of these cases.
• Your home would be declined. Short lease, non-standard construction, needs work, tenanted, or above the value ceiling. Reputable cash buyers consider properties builders will not touch.
• You need a date you control. Part-exchange completion follows the build programme. A cash sale completes in as little as 7 days, on a date you set.
• You want to keep your options open. Selling first and buying later makes you a chain-free buyer, which is leverage on any purchase — new build or second-hand.
• You want a comparable offer before deciding. Getting a cash figure costs nothing and gives you a genuine benchmark against the developer’s number.

Springbok Properties is a principal buyer, a member of the National Association of Property Buyers (NAPB) and regulated by The Property Ombudsman. If you are weighing a developer’s offer, our guides to how a we-buy-any-house sale works and whether cash house buyers are legitimate explain what to check before you commit to either route.

Written by Dan Green, Springbok Properties. Last updated 8 September 2026. Springbok Properties Ltd is a member of the NAPB and regulated by The Property Ombudsman. Figures quoted are typical UK ranges for September 2026 and are not an offer or a valuation.