The market

What actually moves house prices

Almost everything said about house prices is a story about one of five things. It helps to know which one, and how quickly each of them acts.

The cost of borrowing

Most homes are bought with borrowed money, so the price a buyer can offer is largely set by the size of the loan they can service. When borrowing costs rise, the same monthly payment supports a smaller loan, and the ceiling on what buyers can bid falls with it.

This force acts fastest on the parts of the market where buyers are most stretched — typically first purchases and the homes people move to when a household grows. It acts more slowly where buyers are borrowing a smaller share of the price, because their ceiling is set by something else.

The effect is often visible first in the number of sales rather than in prices. Buyers withdraw before sellers reduce.

How many homes are for sale

The second force is simply the count of available homes relative to the number of people looking. A street with one house for sale and four interested households behaves completely differently from the same street with four for sale and one buyer, even though nothing about the houses has changed.

Supply of this kind is volatile and local. A single new development, or a cluster of households all deciding to move at the same stage of life, can change the balance for a season. It is the force most often mistaken for a change in desirability.

Travel time

Distance matters less than duration. A house forty minutes from where people work behaves like a house forty minutes from work, whether that is measured in miles or in changes of train. When a route improves, the effective position of every home along it changes, and prices adjust to the new geography rather than the old one.

This is one of the few forces that is genuinely permanent. Interest rates move both ways; a new bridge does not.

Condition, and what condition really means

Buyers pay for the absence of work more than for the presence of finish. A sound roof, dry walls, a serviceable heating system and wiring that does not need replacing are worth more than any amount of decoration, because they remove uncertainty rather than adding taste.

Improvements that alter the plan — an extra usable room, a better relationship between kitchen and garden — tend to hold their value. Improvements that express a particular taste tend not to, because the next buyer prices in the cost of undoing them.

Sentiment, and why it is real

The fifth force is what people expect. If buyers believe prices will be lower in six months, they wait; waiting reduces demand; demand falling reduces prices. The expectation participates in producing the outcome. The same works in reverse, which is why rising markets can accelerate for reasons that look circular from outside.

Sentiment is the fastest-moving of the five and the least durable. It explains short movements well and long ones badly.

Putting them in order

For a household trying to make sense of a specific street, the practical order is: what has happened to borrowing costs, how many comparable homes are currently available, whether anything has changed about getting in and out of the area, and what condition the particular building is in. Sentiment comes last, not because it is weak, but because it is the hardest to observe honestly while standing inside it.