Final Municipal Approval: the Step That Makes Your Build a Legal House

It is the last step of a build and the most ignored until it is needed. The work is finished, the house looks immaculate, you could move in tomorrow. But until the Municipal Works Department issues the final approval, as far as the State is concerned that house has not been built yet.

Reference information. Requirements are administered by each Municipal Works Department; details can vary by municipality and project type.

What it actually is

Final approval is the act by which the Works Department certifies that what has been built matches the approved building permit and that the home complies with regulations. It closes the cycle that began with the building permit.

Put simply: the permit authorises you to build; the approval certifies that you built what you said you would.

What happens if you do not have it

The bank does not recognise it. A house without approval does not enter the valuation in full, and that affects any future mortgage-backed lending.
The sale falls through or gets discounted. An advised buyer checks this, and the property trades below its real value.
Insurers can object. In the event of a claim, an unapproved building is slippery ground.
Property tax is miscalculated, with the risk of a retroactive adjustment when the Internal Revenue Service updates the assessed value.
You cannot access benefits that require a regular dwelling, including DFL 2.

If you are already in that position with an older building, the route is different and we cover it in regularising an existing building.

What you submit

Application for final approval to the Works Department.
Installation certificates: the electrical declaration to the Superintendency of Electricity and Fuels, gas where applicable, and the drinking water and sewerage solution.
A report from the professional in charge on how the works were executed.
Drawings of what was actually built, where there were changes from the permit.
Payment of the applicable municipal fees.

What holds approvals up most

By far, the installations. Structure and finishes are resolved on site; certificates depend on third parties — authorised installers, utility companies, the health authority — and run on their own timelines. On rural land, the water and wastewater solution is what postpones the process most often, a topic we cover in what you can build on rural land.

The second reason is differences between what was approved and what was built. A change that felt minor during the works — moving a wall, enclosing a terrace, adding a window — forces you to regularise drawings before approval. That is why on-site changes get documented as they happen, not at the end.

When to start preparing it

Not when the works finish: from the moment they start. Installation certificates are generated during construction, not afterwards, and a well-run build reaches the end with the file already assembled. It is one of the real differences between working with a formal builder and coordinating tradespeople yourself, and one of the questions worth asking before choosing a builder.

In a turnkey contract the paperwork is part of the service: the builder answers for the approval, not just for the physical works. It is worth checking that this is written into the contract.

And after approval

With approval in hand, the clock starts on the legal construction warranties, and your after-sales relationship with the builder begins. What to check during the first months is set out in your first year in a new house.

Want the paperwork covered from the start? See what our turnkey service includes, look at our architecture services or write to us.

Final Municipal Approval: the Step That Makes Your Build a Legal House