Doulton Bridging Finance
New Build Mortgages — Home Movers

New Build Mortgage for Home Movers 2026 — Part Exchange, Chain Break, and Rate Reducer

New build mortgage for home movers 2026 — part exchange, chain break bridging, porting vs new application. Rate Reducer open to movers. Doulton Bridging Finance.

Home movers buying a new build have three options for managing their existing property: part exchange (sell to the developer), chain break bridging (buy the new build before selling the existing), or a simultaneous sale and purchase (the most common route). Own New Rate Reducer is open to home movers as well as first-time buyers. DBF manages all three routes and recommends the most appropriate for your specific situation.

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Rate Reducer
Open to home movers — not just first-time buyers
Part exchange
Most major housebuilders offer part exchange schemes
Chain break
DBF arranges bridging to buy before your existing home sells
No SDLT surcharge
No second property stamp duty surcharge if existing home is sold
Current rates · Updated August 2026Residential Mortgage Rates 2026UK residential mortgage rates in 2026 range from 4.33% for the best 2-year fix (Danske Bank, 60% LTV, August 2026) to above 6% for high-LTV or complex income cases.
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NEW BUILD MORTGAGES — HOME MOVERS

Part exchange — understanding the developer's discount

Part exchange (PX) involves the developer or their PX partner buying your existing property at a discount to market value — typically 5%–15% below the open market sale price. On a £300,000 existing property, the PX price might be £265,000–£285,000. The saving in certainty and speed must be weighed against the £15,000–£35,000 reduction in proceeds. PX is typically offered on purchases above a certain price point by the developer — check the terms. DBF models the financial comparison between PX and selling on the open market for every home mover case.

Chain break bridging for home movers

A chain break bridge is a short-term bridging loan secured on your existing property, releasing funds to complete the new build purchase before your existing home sells. DBF arranges chain break bridges from 0.65%/month — on a £200,000 bridge for 4 months, the total interest cost is approximately £5,200. This is typically less than the discount accepted on part exchange. DBF manages both the bridging loan and the new build mortgage simultaneously for home mover clients.

Stamp duty considerations for home movers

A home mover buying a new build before selling their existing property must pay the additional 5% SDLT surcharge for additional residential properties (from Autumn Budget 2024 rate). This is refundable within 12 months if the existing property is then sold. DBF calculates the SDLT position for every home mover case and advises on timing to minimise the surcharge impact.

Home Mover New Build Routes — August 2026

RouteHow it worksProsCons
Part exchangeDeveloper buys your existing home at a valuation discount (~10%). You buy new build simultaneously.No chain. Certain timeline. New build purchase not at risk from buyer falling through.Developer pays below market value. Loss of £10,000–£30,000+ vs open market sale.
Chain break bridgeDBF arranges short-term bridging on existing property to fund new build deposit. Repaid when existing property sells.Buy new build immediately. List existing property simultaneously for best price.Bridge cost (0.65%–0.90%/month plus fees). Complexity of two transactions.
Simultaneous sale and purchaseSell existing property and buy new build in coordinated completion.No bridge cost. Full market value for existing property.Dependent on buyer chain. Risk of delay or collapse. May miss new build slot.
Port existing mortgage + top upMove existing mortgage to new property. Take additional borrowing for difference.May retain existing rate if advantageous.Only possible if existing lender is active in new build market and approves the new property.

Worked example

Home mover. Existing property: £380,000 (outstanding mortgage: £145,000). New build: £420,000.

  • Route A — Part exchange: Developer buys existing at £345,000 (9% discount). Proceeds: £200,000 (after mortgage).
  • Loss vs open market: £35,000 (estimated). Deposit for new build: £200,000 (47.6% LTV).
  • Mortgage: £220,000. Rate: 4.15% (80% LTV or below — excellent LTV). Monthly: £1,148.
  • Route B — Chain break bridge + sell on open market:
  • Bridge: £145,000 (on existing property net of mortgage). 4 months. Cost: £3,770 (bridge interest + fees).
  • Existing property sells: £380,000. Bridge repaid. Net proceeds: £235,000 (after mortgage and bridge).
  • Deposit: £235,000 (55.9% LTV). Mortgage: £185,000. Rate: 4.10%. Monthly: £964.
  • Bridge cost: £3,770. Net saving vs PX: ~£31,230 (£35,000 PX discount minus £3,770 bridge cost).
  • Route B saves approximately £31,230 in this scenario.
The Process

How it works

01

Tell us about your purchase

Share the property details, development, scheme type (Rate Reducer, MGS, shared ownership), and your deposit. We assess your situation same working day.

02

Lender search and scheme check

We identify which lenders accept your income type, development, and property classification — including Rate Reducer and MGS eligibility where relevant.

03

Application and valuation

We manage the full application, coordinate the RICS valuation, and liaise with the developer on build schedule and offer validity.

04

Mortgage offer and completion

Once the offer is issued, we monitor build progress, manage any extensions needed for off-plan delays, and coordinate completion.

FAQs

Frequently asked questions

Can I use Own New Rate Reducer as a home mover?

Yes — Rate Reducer is available to home movers as well as first-time buyers. The scheme has no restriction on whether you have previously owned property. DBF confirms Rate Reducer eligibility for your specific development.

Should I use part exchange or sell on the open market?

Part exchange is simpler and faster — but typically 5%–15% below open market value. Selling on the open market maximises proceeds — but introduces chain risk. Chain break bridging allows you to get the best of both: buy the new build immediately with a bridge while your existing property sells at full market value. DBF models the financial comparison for your specific situation.

Do I pay extra stamp duty if I buy the new build before selling my existing home?

Yes — the additional 5% SDLT surcharge applies if you own two properties simultaneously. This is refundable if you sell the existing property within 12 months of buying the new build. DBF advises on the SDLT position and timing for every home mover case.

Can I port my existing mortgage to a new build?

Porting is possible if your existing lender is active in the new build market and approves the specific development. Not all lenders will port to new builds. DBF assesses whether porting is viable and compares the ported rate vs a fresh application for the best total outcome.

Related finance

Explore related pages

New Build Mortgages Hub

New build mortgages 2026 — specialist whole-of-market broker. Lower LTV, scheme expertise, off-plan offer validity, Own New Rate Reducer.

Own New Rate Reducer

Own New Rate Reducer 2026 — mortgage rates from 1.87% on new build properties. DBF works with Own New participating developments. Compare Rate…

Chain Break Finance

Bridging finance for property chain situations, with rates from 0.49% per month.

New Build vs Resale Mortgage

New build vs resale mortgage 2026 — LTV limits, rates, offer validity, incentives, EWS1. Full comparison. Is a new build mortgage harder to get?…

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