“The smartest move right now is to secure a fixed-rate deal. It’s one of the few real win-win opportunities — it protects you from rising rates while still allowing you to benefit if rates fall.”
— Martin Rayner, financial adviser, Compton Financial Services
Why Reeves is more important than Burnham for mortgages
Here’s something the political coverage is largely missing: the chancellor appointment is more important for mortgage rates right now than Burnham himself. He’s pledged to maintain existing fiscal rules. A chancellor who reinforces that message clearly could actually help settle the gilt market. One who doesn’t — or who is seen as ideologically hostile to fiscal discipline — could undo weeks of gradual rate improvement in a matter of days.
Ian Futcher, financial planner at Quilter, made the point directly: “A Burnham premiership would likely be judged first through the lens of fiscal credibility, and that has direct implications for mortgage rates. If a Burnham-led government were able to reassure investors that it would stick to existing fiscal rules, or deliver a credible plan for managing borrowing, some of that pressure could ease. In that scenario, mortgage pricing could stabilise rather than continue drifting upwards.”
The names in play would each land differently. McFadden and Streeting are broadly seen as fiscally credible. Miliband is not, at least not by bond investors, and Sharon Graham’s very public intervention on Saturday urging Burnham to rule him out won’t have gone unnoticed in the gilt market. Louise Haigh, one of Burnham’s closest allies, faces a separate problem with a past fraud conviction. Ben Perks, managing director of Orchard Financial Advisers, put the short-term outlook plainly: “Overthrowing the prime minister will cause a little turbulence initially, so we could see mortgage rates wobble. But if his pledges are met with approval from the markets, we could see rates improve significantly.” Watch the chancellor appointment. It’s the single variable that matters most in the near term.
“Bond investors like boring and dull — they want someone who has a plan where the maths stacks up and they stick to it.”
— Dan Coatsworth, head of markets, AJ Bell
The land value tax: what it would mean for clients
Burnham’s most structurally significant property policy is his support for replacing stamp duty and council tax with a proportional property tax along the lines proposed by the Fairer Share campaign group. Both taxes abolished; replaced by an annual levy of 0.48% of the property’s current assessed value. Second homes, foreign owners and empty properties would pay double, at 0.96%.
The geography matters enormously. In Kensington and Chelsea, where the average property costs £1.273 million, the annual bill would be around £6,110 — against a current council tax bill of roughly £3,287. The average London homeowner would pay about £260 more per year; London as a whole would pay an estimated £2.5 billion more annually. In lower-value areas outside London, many homeowners would actually pay less. This is not a uniform national story so it really matters where your client base is.
Tom Bill, head of UK residential research at Knight Frank, put the broker-specific concern precisely: annual revaluations would “turn house price growth into an ongoing tax liability, which would inevitably affect decision-making.” The difference between a one-off stamp duty hit at completion and a recurring annual levy is psychologically significant, particularly for clients weighing whether to upsize, downsize or stay put in higher-value markets.
The upside is real: abolishing stamp duty removes one of the biggest transaction barriers in the housing market. Buyers without a five-figure bill at completion move more readily, and more transactions mean more mortgage borrowing.
Tax expert Dan Neidle has flagged, though, that any land-based levy would fall primarily on ordinary residential owners rather than large landowners, which makes the politics considerably harder than they appear. Burnham has called this a “principle” rather than ready legislation. Treat it as a medium-term conversation, especially for clients in London and the South East.
Buy-to-let: the rent controls question
For brokers with buy-to-let clients, Burnham’s support for rent controls is the most immediately consequential element of his housing agenda. The BTL market is already adjusting to a significantly altered landscape under the Renters’ Rights Act. Rent controls on top would be a second structural hit.
The mechanism is direct: capped rental income weakens the yield calculations that underpin BTL mortgage affordability assessments. Lenders assess BTL primarily on rental coverage ratios. A policy environment where rent growth is legally constrained will affect both the viability of leveraged BTL positions and the volume of new purchase applications brokers can get approved.
Burnham’s record in Greater Manchester is more nuanced than it looks from the outside. His approach has combined enforcement against non-compliant landlords — a 43% rise in fines to £1.47 million — with grants of up to £30,000 for EPC improvements through the Good Landlord Charter. He has argued consistently that responsible landlords should be supported rather than just penalised, and has backed a more professionalised private rented sector. The real risk isn’t an ideological assault on landlords. It’s the combination of rent controls, the Renters’ Rights Act, and a £40 billion social housing programme landing simultaneously on a BTL market that is already under serious strain.
The council house programme: what 500,000 homes actually means
Burnham has backed a £40 billion borrowing programme to fund 500,000 council and social homes by 2030 — the largest state housing intervention since the 1970s — alongside suspension of Right to Buy on newly built council homes.
The reality check: total new social and affordable homes delivered across England in 2024-25 was around 63,000. Getting to 500,000 by 2030 would require a transformation of public sector construction capacity that has never happened in peacetime Britain. Whether or not it’s achievable, the borrowing required to attempt it is exactly what the bond market will be reassessing at every fiscal statement. A government already running £23.3 billion of monthly borrowing — £5.6 billion above forecast, with record debt interest costs — doesn’t have much headroom before investors start demanding a higher premium for UK debt.
For brokers this matters in two ways. Large-scale social housing delivered at pace would reduce the private rental demand that underpins BTL yields in areas without a social housing alternative. And in markets where significant new supply arrives, house price growth — and collateral values — may moderate. That’s not automatically bad. A more stable pricing environment helps first-time buyers and the brokers who serve them. It just requires different conversations than the ones the industry has been having for the past decade.
What to do with clients right now
Whatever the political trajectory, around 1.8 million fixed-rate mortgages expire in 2026, many at historically low rates. That refinancing wave doesn’t care who’s in Downing Street. It is the primary volume opportunity in the months ahead and the one thing brokers can act on now, regardless of how the political situation resolves.
Martin Rayner of Compton Financial Services put the client conversation plainly: “Most lenders let you lock in a rate up to six months before your current mortgage ends, while existing lenders will often allow a new deal to be reserved around three months ahead. Waiting until the political uncertainty blows over could see clients roll onto their lender’s SVR — and at 7.13%, that’s a very expensive place to sit.”