Function and technical framework of the partial plan in urban planning

In the legal and real estate framework, spatial planning is structured hierarchically. The General Urban Development Plan (PGOU) sets out the strategic guidelines for a municipality and classifies the land. However, the PGOU does not usually define in detail how blocks, streets and green spaces are distributed within a large tract of land. This is where the partial plan comes into play.

Its primary function is to detail the planning of sectors classified as delimited buildable land or sectorised buildable land. Through this technical and legal document, drawn up by multidisciplinary teams of architects, engineers and lawyers, the precise layout of the new residential neighbourhood or industrial estate to be developed is established.

Main components of a partial plan

For the local authority to approve a partial plan, the document must include a series of technical studies, explanatory reports and detailed maps. The mandatory elements it must cover include the following:

• Land zoning and permitted uses: Precise allocation of primary and secondary uses, whether residential, commercial, service, industrial or public amenity.
• Building rights and development yield: Determination of buildable square metres per plot and the maximum number of authorised dwellings.
• Road network and access points: Layout of streets, avenues, pavements, parking areas and connections to the municipality's existing road network.
• Open spaces and green areas: Boundary definition for parks, gardens and recreational areas that must be surrendered to the local council as mandatory public land allocations.
• Public amenities: Reservation of plots allocated for schools, health centres, sports facilities and cultural centres.
• Essential utility infrastructure: Supply networks for water, sewerage, electricity, public lighting, gas and telecommunications.

Land reservation for VPO in Comunidad de Madrid

One of the most significant aspects when processing a partial plan for residential use is the statutory reservation for subsidized housing. Within the territory of Comunidad de Madrid, regional urban planning legislation stipulates that partial plans must allocate a specific percentage of residential floor area to the construction of Official Protection Housing (VPO) and public infrastructure housing.

This land reservation for VPO in Comunidad de Madrid aims to guarantee access to housing and must be clearly defined within the free and compulsory land transfers made by landowners or developers to the relevant local council during the sector's development.

Administrative stages for approving a partial plan

The approval of a partial plan requires a regulated procedure that ensures technical compliance and public participation. The main stages are as follows:

1. Initial approval: The local council or developer drafts the project, and the full municipal council agrees on its initial approval after verifying formal compliance with statutory requirements.
2. Public consultation period: The file is put on public display for a specified period so that any individual or entity can submit representations or objections.
3. Sectoral reports: Statutory opinions are requested from competent bodies regarding the environment, roads, transport links, water authorities and heritage.
4. Provisional approval: Following the public consultation period and the incorporation of sectoral reports, the municipal body provisionally approves the document with any necessary amendments.
5. Definitive approval and publication: Definitive approval rests with the local council or regional government, depending on the division of powers. The partial plan comes into force following its publication in the corresponding official gazette.

Differences between PGOU, partial plan and development project

To understand the land transformation process, it is useful to distinguish between the different tiers of urban planning:

• PGOU (General Plan): Determines the general structure of the municipality and classifies land as urban, buildable or non-buildable.
• Partial plan: Defines the detailed planning and land uses for a specific sector of buildable land.
• Development project (Proyecto de urbanización): This is the technical execution project setting out the detailed construction specifications for streets, water networks, public lighting and drainage without altering the planning established by the partial plan.

Financing and economic viability of a buildable sector

Definitive approval of a partial plan substantially increases land value, as it makes the land suitable for development infrastructure. However, development costs, infrastructure liabilities and mandatory land transfers require rigorous financial analysis by developers and real estate investors.

Financial institutions require robust guarantees and advanced technical planning before granting developer loans or credit for land acquisition during the development phase. In these complex scenarios, specialist guidance is essential. Seeking support from mortgage credit intermediaries facilitates negotiations with banks and the structuring of tailored financing solutions aligned with the project timeline.

Frequently asked questions about partial plans

Who can draft and promote a partial plan?

A partial plan can be promoted by public administration or through private initiative. Under private initiative, the proposal is typically submitted by landowners holding the majority of the sector's surface area or by legally authorised development companies.

Can you build immediately after a partial plan is approved?

No. Approval of the partial plan establishes the layout but does not grant direct permission to build. To start construction, it is necessary to process and approve the land reallocation project (proyecto de reparcelación), execute the works set out in the development project, and obtain the relevant building licences.

What happens if a partial plan violates the PGOU?

The partial plan is hierarchically subordinate to the General Urban Development Plan (PGOU). If a partial plan contradicts the land classification, increases building density beyond the established limits or violates the provisions of the PGOU, it is null and void as a matter of law and can be overturned by the courts.