# PBZPA and PBZPAH in Brazil: protection zone plans guide

> Learn how PBZPA and PBZPAH define obstacle limitation surfaces around airfields and helipads in Brazil, and how these airspace zones impact real estate development.

Published Nov 5, 2026 · Norte Sul Consult · https://www.nortesulconsult.com.br/en/blog/pbzpa-protection-zone-plans-brazil

## Key takeaways

- PBZPA and PBZPAH establish 3D obstacle limitation surfaces that safeguard aircraft approach, departure, and maneuvering corridors.
- Developers and general contractors must review protection zone restrictions before designing tall structures or erecting tower cranes on site.
- Technical reviews are conducted by COMAER (Brazil's Aeronautical Command) via regional CINDACTA units or SRPV.
- Unapproved structures that penetrate obstacle limitation surfaces face municipal stop-work orders, loss of occupancy permits (Habite-se), and federal sanctions.

The **PBZPA** (*Plano Básico de Zona de Proteção de Aeródromo*, or Airfield Basic Protection Zone Plan) is a set of three-dimensional imaginary geometric surfaces that delimit airspace around aviation infrastructure to ensure flight safety and operational regularity. Together with the **PBZPAH** (*Plano Básico de Zona de Proteção de Heliponto*, for helipads), this technical plan restricts the erection of any ground obstacle that could endanger air operations. In practice, the plan establishes the maximum vertical height limit that civil developments, telecommunications towers, utility poles, and construction sites can reach across a given territory.

With ongoing urban densification around major commercial corridors and airports, the intersection between real estate development rights and aviation safety has become critical. Understanding how these plans function prevents design misalignments that delay construction schedules, trigger municipal stop-work orders, or block the licensing of private runways and helipads.

## What is an airfield basic protection zone plan (PBZPA)?

The basic protection plan serves as a three-dimensional aerial zoning mechanism established over an airfield and its surrounding area. Its primary goal is to prevent buildings, terrain, or other human-made structures from interfering with visual or instrument takeoff, landing, and circling maneuvers.

This airspace zoning projects a system of Obstacle Limitation Surfaces (OLS, or *Superfícies Limitadoras de Obstáculos - SLO* in Brazil). The primary surfaces include:

- **Approach surface:** an inclined ramp that guides aircraft down safely toward the runway threshold.
- **Takeoff climb surface:** an inclined plane safeguarding the climb trajectory as aircraft gain altitude immediately after liftoff.
- **Transitional surface:** a sloping side surface connecting the runway strip and approach surfaces to the horizontal surfaces.
- **Inner horizontal surface:** an imaginary horizontal plane established at a standardized height above the airfield elevation datum, safeguarding visual traffic patterns.
- **Conical surface:** a surface sloping upwards and outwards from the periphery of the inner horizontal surface, broadening the regional safety envelope.

Any structure planned underneath these spatial projections must comply with the altimetric thresholds defined by DECEA (Brazil's Department of Airspace Control), governed by regulations such as ICA 11-408, which governs restrictions on objects projected into airspace.

## What is the difference between PBZPA and PBZPAH?

While both frameworks share the mission of safeguarding navigable airspace, their geometric envelopes reflect the operational profiles of distinct aircraft types. A PBZPA applies to runways accommodating fixed-wing aircraft, whereas a PBZPAH is designed specifically for helicopter landing facilities.

Airfield protection zones encompass extensive horizontal envelopes, with radii that can reach about 15 km depending on runway classification and visual or instrument operation criteria, aligned with RBAC No. 154 (the Brazilian Civil Aviation Regulation governing aerodrome design). By contrast, helipad plans are tailored to helicopter flight performance and RBAC No. 155 rules, centering the protection surfaces around the Touchdown and Lift-off Area (TLOF) and the Final Approach and Take-off Area (FATO).

| Feature | PBZPA (Airfields & Airports) | PBZPAH (Helipads) |
| :--- | :--- | :--- |
| **Application scope** | Runways for fixed-wing aircraft | Elevated and surface helipads |
| **ANAC design standard** | RBAC No. 154 | RBAC No. 155 |
| **Trajectory geometry** | Long ramps aligned with runway centerline | Departure and approach sectors (bidirectional or omnidirectional) |
| **Typical monitoring reach** | Radii that can reach about 15 km, depending on runway category and type of operation | Focused footprint centered along arrival/departure paths |
| **Primary flight profile** | Linear, continuous takeoffs and landings | Vertical and steep oblique transitions |

In both instances, drafting [Protection Zone Plans (PBZPA & PBZPAH)](https://www.nortesulconsult.com.br/en/services#pbzpah) requires rigorous technical accuracy to ensure seamless clearance across all regulatory bodies.

## Who needs to draft or review these protection plans?

Interacting with protection zone plans applies to two distinct groups: facility operators and neighboring property developers.

On one side, owners and operators of private airfields and helipads—including corporate headquarters, hospitals, private communities, and industrial hubs—must submit an approved protection plan to complete [helipad & airfield registration](https://www.nortesulconsult.com.br/en/services#homologacao). Without a registered plan approved by DECEA and filed with ANAC (Brazil's National Civil Aviation Agency), an air facility cannot lawfully operate.

On the other side, developers, asset managers, and civil engineering firms must consult these plans before commencing projects within monitored zones. Review is essential for:

- Multistory residential, commercial, or mixed-use towers;
- Telecommunication towers, transmission lines, and antennas;
- Temporary heavy equipment on job sites, notably tower cranes and boom pumps;
- Logistics facilities, distribution centers, and warehouses adjacent to airports.

Overlooking obstacle limitation surfaces can prompt municipal authorities to deny building permits or withhold the final occupancy certificate (*Habite-se*) until aeronautical clearance is presented. In addition, an approved PBZPA/PBZPAH is a prerequisite for helipad registration, which typically takes 60 to 120 days from initial submission to final publication in the DOU (*Diário Oficial da União*, Brazil's Federal Official Gazette), depending on technical complexity and agency workloads.

## How protection zone plans restrict nearby construction

Protection zone plans limit building heights based on absolute orthometric elevation above mean sea level (AMSL), rather than merely the building's physical height measured from ground level. This technical distinction is critical.

If a parcel sits atop a hill or natural elevation near an approach corridor, a four-story building might pierce an approach or conical surface. Conversely, within a valley or topographical depression, a significantly taller tower might remain safely beneath the OLS ceiling.

When an architectural project plans to erect a structure whose highest point (including architectural parapets, water tanks, antennas, or rooftop mechanical equipment) enters monitored airspace, the developer must open an [airspace obstacle analysis (OPEA)](https://www.nortesulconsult.com.br/en/services#opea) process. Through this filing, the regional CINDACTA (Integrated Air Defense and Air Traffic Control Center) evaluates whether the proposed height interferes with flight paths or if it meets the safety criteria defined in ICA 11-408.

Federal aviation safety legislation overrides municipal master plans (*Planos Diretores*). Even if local municipal zoning allows higher floor-area ratios or generous height allowances, DECEA's altimetric restrictions maintain legal preeminence.

## Technical steps to draft an airfield protection plan

Drafting a PBZPA or PBZPAH requires strict adherence to geodetic standards and flight procedures. The technical workflow follows four core stages:

1. **High-precision geodetic survey:** executing [aeronautical topographic surveys](https://www.nortesulconsult.com.br/en/services#topografia) tied to Brazil's official datum (SIRGAS 2000), pinpointing the exact coordinates and orthometric elevations of runway thresholds or the helipad FATO.
2. **Obstacle inventory:** surveying existing towers, trees, power lines, and natural terrain features that already touch or penetrate projected surfaces.
3. **3D surface modeling:** mathematically projecting all applicable OLS ramps, slopes, and horizontal planes based on runway dimensions, aircraft design categories, and approach types.
4. **Regulatory compilation and submission:** assembling technical drawings, descriptive memorials, and formal filings via DECEA's electronic platform (SysAGA), signed by accredited engineers.

COMAER (Brazil's Aeronautical Command) analysts review the submission to verify that projected surfaces preserve regional instrument and visual air traffic. The workflow may also coordinate with ANAC for final aerodrome cataloging.

## What happens if a building breaches obstacle limitation surfaces?

Penetrating limitation surfaces without prior clearance leads to severe operational, legal, and financial liabilities.

For the airfield or helipad operator, an unapproved obstacle can force authorities to raise visual or instrument landing minimums, ban night operations, or close the runway entirely, impairing asset value and route connectivity.

For the developer or general contractor, the consequences are immediate:

- Administrative stop-work orders and site shutdowns by regulatory inspectors;
- Withheld occupancy permits (*Habite-se*) from the local municipality;
- Judicial orders requiring structural lowering or demolition of non-compliant upper floors;
- Costly construction schedule delays, legal battles, and buyer compensation claims.

In select technical scenarios where natural terrain or pre-existing taller buildings already shadow the proposed site, engineers can request the application of the "shadow principle" (*princípio da sombra*) under Brazilian aviation doctrine. However, shadow relief is never automatic: it requires rigorous simulation and remains subject to the discretionary evaluation of COMAER technical divisions.

## How Norte Sul Consult can help

Norte Sul Consult brings together a specialized technical team composed of aviation engineers, commercial pilots, airspace designers, and regulatory liaisons to manage PBZPA and PBZPAH drafting, obstacle surveys, and OPEA filings across Brazil. Our firm interacts directly with DECEA, ANAC, COMAER, and regional CINDACTAs, working under milestone-based fixed proposals with continuous progress tracking through our dedicated [Client Area](https://www.nortesulconsult.com.br/en/client-area). To evaluate height limits for your real estate development or certify your aviation infrastructure, [contact our team](https://www.nortesulconsult.com.br/en/contact) today.

## Frequently asked questions

### Which authority approves PBZPA and PBZPAH in Brazil?

PBZPA and PBZPAH plans are reviewed and approved by DECEA (Department of Airspace Control), an organization subordinate to COMAER (Aeronautical Command). Field evaluations are handled regionally by CINDACTA units or SRPV (Regional Flight Protection Service).

### How can I verify if my parcel is affected by an airfield protection zone?

Verification requires a spatial and altimetric study cross-referencing your site coordinates and elevation (in SIRGAS 2000) against DECEA's registered obstacle limitation surfaces for nearby airfields and helipads.

### Do temporary structures like tower cranes need to comply with PBZPA?

Yes. Temporary construction equipment, including tower cranes, mobile cranes, and concrete pumps, are classified as objects projected into airspace if they pierce protection surfaces. Operating cranes near aerodromes requires prior authorization from DECEA before on-site assembly.

### What happens if a developer builds without DECEA approval near an airfield?

Building without DECEA clearance blocks the issuance of municipal occupancy permits (Habite-se), leaves the job site vulnerable to immediate administrative injunctions, and exposes the project to judicial lowering or demolition mandates.

### What is the shadow principle in Brazilian airspace restrictions?

The shadow principle allows a new structure to exceed standard height envelopes if it sits entirely within the geometric shadow cast by an existing, permanent, and taller natural or artificial obstacle. Its approval is discretionary and subject to strict DECEA review.

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Norte Sul Consult — Talk to the Norte Sul Consult technical team and get a preliminary assessment of your case. contato@nortesulconsult.com.br · WhatsApp +55 (49) 9 9131-0091 · https://www.nortesulconsult.com.br/en/contact