Falling Mortgage Rates and New-Build Schemes: What London’s First-Time Buyers Need to Know in 2026

The past few months have brought a welcome shift for anyone trying to get onto the London property ladder. Major lenders including Halifax, Nationwide, Santander, and HSBC have all announced mortgage rate cuts in recent weeks, with some 5% deposit deals now sitting below 5.37% for a two-year fix and 5.30% for a five-year fix. At the same time, the government has moved to make the Mortgage Guarantee Scheme permanent — a meaningful signal, as IREIS Properties has been advising clients, that 5% deposit mortgages are here to stay.

If you’ve been waiting for the right moment to take that first step, the landscape today looks quite different from where it stood 18 months ago. But getting the best outcome from a new-build purchase means understanding the schemes, the small print, and what a new-build warranty actually covers — before you put down a reservation fee.

The Mortgage Guarantee Scheme: Now Permanent

For years, the 5% deposit mortgage felt like a temporary lifeline, extended year after year under political pressure. That uncertainty is now over. The Mortgage Guarantee Scheme has been confirmed as a permanent fixture, giving lenders the confidence to keep offering 95% loan-to-value mortgages without the fear of the programme expiring beneath them.

In practical terms, this means you can buy a property with as little as a 5% deposit and take out a mortgage for the remaining 95%. As of mid-May 2026, Halifax and Lloyds Bank are offering a two-year fixed rate at 5.37% on a 95% LTV deal, while Nationwide’s five-year fix at the same LTV sits at 5.30% — both figures drawn from HomeOwners Alliance’s weekly rate tracker (May 2026). Halifax also announced on 18 May 2026 that first-time buyers can now qualify with a minimum deposit of just £5,000.

Rates are still higher than the historic lows of 2021, but the direction of travel is downward, and locking in a five-year fix now insulates you from further short-term volatility.

The First Homes Scheme: New-Builds at a Discount

If you’re looking specifically at new-build properties, the First Homes Scheme offers one of the most compelling routes to purchase available to first-time buyers in England. Eligible buyers can acquire a new-build property at a minimum 30% discount below market value — and in some areas, up to 50% off. In London, the discounted purchase price must not exceed £420,000 after the reduction has been applied.

The discount is permanent and passes on to future buyers when you sell, meaning the scheme contributes to affordability over time rather than simply inflating prices for the next buyer in the chain. Eligibility criteria apply — including income thresholds and local connection requirements in some areas — so it’s worth checking the government’s First Homes guidance and speaking to a Help to Buy agent early in your search.

The government also confirmed in March 2026 that all homes in the proposed Seven New Towns programme — a major housebuilding initiative targeting at least 10,000 homes per town across England — will be new-build, meaning First Homes eligibility will apply across what could become the largest-ever expansion of the scheme’s reach.

What Your NHBC Warranty Actually Covers (and Doesn’t)

One of the genuine advantages of buying new-build over older stock is the NHBC Buildmark warranty — a 10-year protection policy that comes as standard with the vast majority of new homes built by registered developers in the UK. At IREIS Properties, we always walk clients through this document before they exchange, because the fine print matters more than most buyers realise.

The coverage works in two stages. For the first two years after legal completion, your developer is responsible for resolving any defects raised with them — everything from snags like sticking doors and poor finishes to more significant structural issues. From year three through to year ten, NHBC’s own insurance kicks in to cover the cost of repairing damage caused by defects in structural elements: foundations, external walls, roofs, glazing, and the like.

What it does not cover is general wear and tear, cosmetic issues, or problems that arise from the homeowner’s own alterations. It also won’t cover defects you fail to report to the developer during that critical two-year window — so keep a written snagging log from the day you move in and document everything in writing. Ask your conveyancer to confirm the Buildmark certificate is in order before exchange; it should be standard in the title pack on any new-build transaction.

Stamp Duty: Always Use the Calculator

First-time buyers benefit from Stamp Duty Land Tax (SDLT) relief, but the rules and thresholds are tied to purchase price, property type, and other factors that make any ballpark figure misleading. Before you finalise your budget, use the calculator below to get an accurate figure based on your actual purchase price.

Sources: HomeOwners Alliance weekly rate tracker (May 2026); Mortgage Solutions lender round-up (April 2026); What Mortgage, first-time buyer reforms (2026); GOV.UK First Homes scheme guidance; NHBC Buildmark cover documentation.