Can you get a mortgage for a prefab house?

Mortgage for a prefab house: what decides is whether it is real estate

Only real estate can be mortgaged (article 106 of the Mortgage Law): whatever cannot be removed from the ground without breaking it, according to the Civil Code (article 334).

• •Real estate: anchored to a foundation on land you own, with a permit and the new build registered, whether timber, concrete, steel or a container.
• •Movable property: it can be taken elsewhere without breaking it, like a house on wheels. The Supreme Court requiring it to have a permit (ruling of 5 December 2024) does not make it real estate.

The same line decides the VAT: 10% if it is permanently fixed to the ground, 21% if it can be moved without being broken (ruling V5259-26 of the Directorate-General for Taxation, July 2026).

What the bank asks for

The same as for a conventional house, and almost all of it is paperwork you already need to build:

• •The land in your name and registered, on land where a home is allowed (which permit you need is in permits for a prefab house).
• •A stamped project, a building permit and a budget.
• •A valuation by a firm approved by the Banco de España. You pay for it, and the bank has to accept one you already have that has not expired.

The notary, registry, agency and the tax on the deed are paid by the bank. And it must give you the FEIN, the sheet with the terms, at least ten days before signing.

The self-build mortgage: the money comes in stages

The usual formula is the self-build mortgage (hipoteca autopromotor): the bank lends against the valuation of the finished house, usually up to 80%, and releases the money in stages.

• •You draw it in proportion to the work done, against certificates from the site architect that the valuer checks.
• •The last payment comes with the house finished, its first occupancy permit and the building registered.
• •Meanwhile, you pay only the interest on what you have drawn.

Check how long that period lasts: in Caja de Ingenieros' template, if it ends before the work does, whatever you have not drawn goes to pay down the loan. Real timelines are in how long a modular house takes.

Where it clashes with a prefab: the payments to the manufacturer

A conventional house grows on your plot and the bank pays as it grows; a prefab is largely made in a workshop:

• •If the manufacturer charges on signing or as it builds, that money goes out before there is any work to certify on your plot: either you advance it yourself, or you agree payments by milestones the bank can check.
• •Some banks do not accept it: BBVA warns that its self-build mortgage does not take prefabricated houses.

Before signing with the manufacturer, ask the bank whether it accepts it and how it certifies what is made off the plot. How to split the payments is in a prefab house step by step.

How much to borrow: the finished house, and what its price leaves out

The bank values the finished house on your land, not the advertised price:

• •A turnkey house comes to a median of €1,639/m² (137 houses from 21 manufacturers); by material and size, in the price per m² comparison.
• •Many of those prices are a “from” (50 of 189).
• •The foundation is included in the price in 42 of those 189 houses, and VAT in 8. Whatever is not included, add it, along with the land, the utility connections and the permit.

And a small project may not reach the bank's minimum amount, which idealista puts at about €50,000. Quite a few houses cost less than that (40% of those with a published price).

When there is no mortgage, and how to pay instead

If the house is movable property, or sits on a rented plot, there is no mortgage:

• •Personal loan: the route for mobile homes and tiny houses, and a much dearer one: the average rate for consumer credit is more than double that for home loans, according to the Banco de España.
• •Mortgage at the end: if the house ends up anchored and registered as a home, it can then be mortgaged, and that mortgage can pay off the loan for the build, if a bank grants it.

Each bank decides: compare them before signing with the manufacturer

No condition is universal: each bank decides how much it finances, over how many years, how much savings it asks for and whether it accepts a prefab. The material hardly matters.

Compare offers with the project and the manufacturer's budget in hand: the more items it includes, the fewer payments are left loose. Atlántida Homes' Era (in Spanish) and MasArea Modular's Guadarrama (in Spanish) include the project, the permit and the foundation; The Corten Company's Guadalquivir (in Spanish), a container house, the project and the foundation, but not the permit.