Do semis ever cost more than a detached house?

Property has few iron laws, but this comes close: across England and Wales, the typical detached house costs more than the typical semi-detached house. Not usually — always, once you look at areas with enough sales to measure honestly.

Homecost examined every postcode district with a reliable 2025 sample of both types: at least 30 semi-detached sales and at least 15 detached sales. That is 1,652 districts, from the cheapest corners of the North to the priciest streets of London. In every single one, the median detached home sold for more than the median semi. Not 1,600 of them. All 1,652.

That makes "detached beats semi" one of the most consistent patterns in the UK housing data — more reliable than any regional trend, and worth understanding before you compare a semi in one area with a detached home in another.

The national type ladder

Ranked by the 2025 median sale price (Land Registry price-paid records, standard residential sales, England and Wales):

The step from semi to detached is the biggest on the ladder: £145,000, or about 53% more, at the national median. It is also the widest gap by count — a semi is the single most-traded property type in the country, so the semi-to-detached jump is the one buyers meet most often.

One quieter detail: nationally, the typical terraced house and the typical flat now change hands for the same figure — £240,000 each. The old assumption that "a house always beats a flat" has largely closed at the bottom of the ladder, even as it holds firm at the top. (We mapped the house-versus-flat side of this in detail in our look at the flat-versus-house price gap across London boroughs.)

How big is the detached premium — and how consistent?

The size of the detached premium varies enormously by area, even though its direction never does. Across the 1,652 districts:

• The smallest detached premium over a semi was +4.6%.
• A quarter of districts sat below +39%.
• The median district had a detached premium of +49%.
• A quarter sat above +60%.
• The largest premium reached +219% — more than triple the semi price — in prime districts where detached houses are rare, large and set in their own grounds.

So the type order is fixed, but the gap is a local story. In a compact terraced-and-semi suburb the detached premium can be modest; in a leafy commuter district it can be the difference between a family semi and a seven-figure house. That local spread is exactly what a postcode-level tool is for — you can check the property-type price mix in Bristol's BS6 or any postcode to see how the ladder looks on one street rather than nationally.

So where does a semi outprice a detached house?

Search the raw numbers without a sample guard and three districts appear to break the rule:

At face value the semi wins in all three. Look at the sales counts, though, and the illusion is obvious: each rests on just 11 to 14 detached sales, against 60 to 90 semi sales. These are places where the semi-detached stock is the dominant, characteristic housing — in BS6, grand Victorian villa-halves in prime conservation streets — while genuine detached houses are so scarce that a handful of smaller or newer ones can drag the median below the villas next door.

Raise the bar to a still-modest 15 detached sales, and all three exceptions disappear. At that threshold, the number of districts where a semi outprices a detached house is exactly zero. It is not that the effect is rare; it is that it does not survive contact with a credible sample. That is why Homecost applies minimum-sample guards to every district figure — a median built on a dozen sales is a headline waiting to mislead. (Our BS6 flat-market guide shows the same district's flat stock, where the sample is far deeper.)

The closest calls

Even where the detached premium is thinnest, the detached home still wins. These are the districts (with 15+ detached sales) where a semi comes nearest to catching up:

These are the exceptions that prove the rule. In each, the detached premium has shrunk to single digits — typically where the detached houses are compact post-war builds and the semis are larger or better located — but it never turns negative. The type ladder bends; it does not break.

What this means when you compare homes

The practical point is not "detached is always dearer" — everyone knows that. It is that the gap is where the information lives. Two buyers with the same budget face very different choices depending on their district: in one area, stepping up from a semi to a detached home costs 5% more; in another, it doubles the price. A national average hides both.

It also means cross-area comparisons need care. A £420,000 budget buys the median detached home in England as a whole — but a semi in a high-premium southern district, or a detached house with room to spare in a lower-premium northern one. The type on the estate-agent listing tells you less than the type and the postcode together. For a related angle on how far a fixed budget stretches by location, see our ranking of price per square foot across UK cities, and more market analysis built from the same records.

These are district-level medians drawn from Land Registry price-paid data for standard residential sales completed in 2025, fetched in July 2026. They describe how a property type has sold across many homes in an area — they are not a valuation of any individual property, whose price depends on its size, condition and exact location.