Technical article for a specialized magazine in architecture, urban planning, and real estate management.

Change of use: a real estate opportunity with high technical complexity

The change of use of a property —especially from commercial premises to housing— has established itself as one of the fastest-growing urban planning operations in the city of Valencia. The scarcity of residential land, the high price of housing, and the existence of numerous underutilized premises have driven this type of action.

However, high economic interest has been accompanied by a significant increase in denied files, municipal requirements, and procedures that drag on for months due to perfectly avoidable errors.

Experience shows that the success of the case depends much more on the preliminary study than on the execution of the works themselves.

The first requirement: check that it is possible from an urban planning perspective

The question is not whether a home can technically be built.

The correct question is:

Does urban planning permit that residential use on that plot?

Even before drafting a project, the following must be analyzed:

• Urban classification and qualification.

• Compatibility of residential use.

• Particular conditions of the area.

• Protection catalog.

• Heritage constraints.

• Specific ordinances.

• Building conditions.

This preliminary analysis avoids starting cases destined for failure from day one.

Applicable technical regulations

A change of use implies justifying simultaneous compliance with different regulations.

Among the main ones are:

• Technical Building Code (CTE).

• Decree 65/2019 of Habitability of the Valencian Community.

• Municipal regulations of the Council of Valencia.

• Accessibility regulations.

• Fire safety.

• Sanitation.

• Protection against noise.

• Energy efficiency.

It is not enough to comply with just one part.

The file must documentarily justify all of them.

Technical requirements that most affect feasibility

1. Clear height

One of the most frequent problems appears in old commercial premises.

False ceilings, existing installations, and floor slabs reduce the available useful height.

A difference of barely ten centimeters can turn a viable file into an unviable one.

2. Natural lighting and ventilation

The future housing must have sufficient lighting and ventilation in accordance with habitability regulations.

Excessively deep premises or those with a reduced facade usually require major interior modifications.

In numerous cases, this circumstance proves impossible to resolve.

3. Accessibility

The change of use does not only affect the interior of the property.

It may force a review of:

• accesses

• accessible routes

• common areas

• portals

• evacuation routes

Especially when it comes to existing buildings.

4. Fire protection

It is common for commercial premises to have different conditions than those required for a home.

Justification through the Basic Document SI usually requires specific constructive solutions.

5. Installations

The home must have:

• water supply

• sanitation

• ventilation

• electricity

• telecommunications

• DHW production

• smoke evacuation when necessary

Many interventions fail because these installations cannot be executed without affecting common elements of the building.

Responsible Declaration or License

One of the questions that generates the most doubts is determining which administrative procedure is applicable.

Not all changes of use follow the same administrative path.

Depending on the action, the scope of the works, and the determinations of the municipal regulations, the processing can be done through a Responsible Declaration or through an urban planning license. Incorrectly choosing the procedure is one of the most common reasons for the suspension of the file.

Real processing times

In simple operations that are correctly prepared, the procedure can proceed quickly.

In contrast, files with municipal requirements can easily double these times.

The seven errors that delay a file the most

1. Buying the property without a prior study

This is probably the most costly mistake.

Many buyers formalize the acquisition assuming that the change of use will be automatic.

Later, they discover that it is urbanistically impossible.

2. Not reviewing the community statutes

Even if urban planning regulations allow the change of use, certain community statutes may contain relevant limitations that must be analyzed beforehand.

3. Creating incomplete plans

Poor data collection generates:

• project modifications

• new measurements

• rectifications

• complementary reports

All of this translates into delays.

4. Submitting incomplete documentation

Municipal requirements usually respond to the absence of:

• technical justifications

• certificates

• specific studies

• graphic documentation

Each requirement can add several weeks or months to the procedure.

5. Underestimating the work

An incorrect material execution budget generates incidents in:

• fees

• ICIO (Tax on Constructions, Installations, and Works)

• contracting

• certifications

Subsequently, it becomes necessary to modify the administrative documentation.

6. Not coordinating project and execution

Modifications frequently appear during construction that affect the authorized project.

Every significant variation must be correctly documented.

7. Neglecting the final phase

Finishing the work does not mean having concluded the procedure.

It will still be necessary to manage, as applicable:

• final work certificate

• cadastral update

• public deed of change of use

• land registry registration

• procedures for occupation and commissioning when required

The importance of the feasibility study

Most problems appear before the project is drafted.

A correctly developed feasibility study must simultaneously analyze:

• urban planning regulations

• building regulations

• habitability

• accessibility

• structure

• installations

• heritage protection

• registry implications

• homeowners association

• real costs

• economic profitability

This document allows one to know with reasonable accuracy whether the file has real chances of success.

Conclusion

The change of use in Valencia today constitutes one of the most interesting operations for owners, developers, and investors. However, its apparent simplicity is deceptive: it combines urban, technical, administrative, and registry requirements that require rigorous planning.

The difference between a case resolved in a few months and another that remains blocked for more than a year usually lies in the quality of the prior study. Analyzing urban compatibility, verifying habitability conditions, and anticipating potential municipal requirements before submitting documentation significantly reduces processing times, minimizes incidents, and increases the chances of obtaining a favorable resolution.

In short, a successful change of use does not begin with the construction work, but with an exhaustive technical and legal diagnosis that turns the viability of the project into a certainty before starting the administrative procedure.