Estidama Pearl Rating System: A Guide for Abu Dhabi Projects

What Does Estidama Mean?

Estidama is the Arabic word for "sustainability". It is also the name of Abu Dhabi's sustainability programme for the built environment, developed by the Abu Dhabi Urban Planning Council (UPC). The Council's planning functions have since moved under the Department of Municipalities and Transport (DMT), which now oversees Estidama alongside the emirate's building permit process.

The working tool of the programme is the Pearl Rating System (PRS). When people search for "Estidama certification", they almost always mean a Pearl rating: a score of 1 to 5 Pearls given to a building, villa or community in Abu Dhabi according to how well it performs on water, energy, materials, comfort and the design process itself.

This guide explains how the Pearl Rating System is structured, what the mandatory minimums are, what 2 Pearls and above require, and what the design team has to prepare before a project can be rated.

Estidama at a Glance

Question	Answer
What it is	Abu Dhabi's green building rating framework, the Pearl Rating System
Developed by	Abu Dhabi Urban Planning Council; now under the Department of Municipalities and Transport
Where it applies	The Emirate of Abu Dhabi, including Al Ain and Al Dhafra
Rating systems	PBRS (buildings), PVRS (villas), PCRS (communities)
Levels	1 to 5 Pearls
Mandatory minimum	1 Pearl for all new buildings and villas; 2 Pearls for government-funded buildings
Rating stages	Pearl Design Rating, then Pearl Construction Rating
Dubai equivalent	Al Sa'fat (Dubai Municipality); Estidama does not apply in Dubai

The Three Pearl Rating Systems

Estidama uses a separate rating system for each type of development, because a single villa, an office tower and a master-planned community have very different sustainability levers.

• Pearl Building Rating System (PBRS): buildings other than villas, such as offices, residential apartment buildings, retail, schools, hotels and mixed-use developments.
• Pearl Villa Rating System (PVRS): individual villas and villa developments. It uses a simpler credit structure suited to single-family homes.
• Pearl Community Rating System (PCRS): master-planned communities and large developments, assessing the layout, infrastructure and public realm as a whole.

A building inside a rated community still needs its own building or villa rating. The community rating covers the master plan; it does not replace the rating of each plot.

Pearl Levels and Mandatory Minimums

Each rating system has two kinds of credits. Required credits are mandatory: every one must be met, whatever Pearl level the project targets. Optional credits earn points, and the number of points decides how far above 1 Pearl the project goes.

• 1 Pearl: all required credits met. This is the mandatory minimum for every new building and villa in Abu Dhabi.
• 2 Pearls: all required credits plus a set number of optional credit points. This is the mandatory minimum for government-funded buildings.
• 3, 4 and 5 Pearls: all required credits plus progressively higher point totals. These levels are voluntary and are usually targeted by developers who want a visible sustainability standard.

What does Pearl 2 require?

Under version 1.0 of the Pearl Building Rating System, 2 Pearls requires every required credit plus 60 optional credit points. The higher levels need 85 points (3 Pearls), 115 points (4 Pearls) and 140 points (5 Pearls). The villa and community systems use their own thresholds, and the design team should always check the version of the rating system that applies to the project at the time of registration.

The Seven Credit Categories

Credits in the Pearl Rating System are grouped into seven categories. The names vary slightly between the building, villa and community systems, but the structure is the same:

• Integrated Development Process (IDP): working as an integrated team from the start, setting sustainability targets early and commissioning building systems properly.
• Natural Systems (NS): protecting and restoring the site's ecology and reducing the impact of development on the natural environment.
• Livable Buildings, Villas or Communities (LB / LV / LC): outdoor thermal comfort, shading, daylight, indoor air quality and occupant comfort.
• Precious Water (PW): reducing indoor water use with efficient fixtures, cutting landscape irrigation demand and metering water use.
• Resourceful Energy (RE): minimum energy performance, passive design that reduces cooling loads, efficient systems, energy metering and renewable energy.
• Stewarding Materials (SM): responsible material choices, recycled and regional materials, and construction waste management.
• Innovating Practice (IP): design or technology that goes beyond the standard credits.

Water and energy carry the most weight in the Gulf climate, so the Precious Water and Resourceful Energy categories usually decide whether a project reaches 2 Pearls or more.

Design Rating and Construction Rating

A Pearl rating is not awarded once. It is assessed at two stages:

• Pearl Design Rating: assessed on the design documents. In Abu Dhabi it forms part of the building permit process, so the design has to show compliance with the required credits, and any targeted optional credits, before a permit is issued.
• Pearl Construction Rating: assessed after construction to confirm that the building was built as designed. It relies on evidence from site, such as installed materials, fixture data and commissioning records.

The design rating is therefore a commitment, not the final result. If the contractor substitutes materials or systems that do not meet the credit requirements, the construction rating can fall short of what the design achieved.

What the Design Team Prepares

Most of the work behind a Pearl rating happens at design stage. A typical design-stage package includes:

• Credit strategy: a list of the required credits and the optional credits the project will target, agreed with the owner at concept stage.
• Energy calculations: building energy performance calculated with the methodology the rating system specifies, supported by envelope, glazing, shading and HVAC design decisions.
• Water calculations: indoor water use against the baseline, based on the specified fixture flow rates, and landscape irrigation demand.
• Drawings and specifications aligned to the credits: insulation and glazing performance, shading, efficient MEP equipment, meters, refrigerants, materials and waste provisions written into the documents the contractor will build from.
• Credit documentation: the forms, calculations and supporting evidence for each credit.

Pearl-rated projects also appoint a Pearl Qualified Professional (PQP): an individual trained and accredited under the Estidama programme, who guides the team on the credits and supports the rating submissions. The PQP is appointed for the project by the owner or their team.

How to Get Estidama Certification: The Sequence

1. Confirm the rating system and target. Building, villa or community; 1 Pearl as the minimum, 2 Pearls if the project is government-funded, or higher if the owner chooses.
2. Assemble the team. The owner appoints the design consultants and the project's PQP.
3. Set the credit strategy at concept stage. Decisions on orientation, massing, shading and glazing are cheapest to change before detailed design begins.
4. Develop the design with the calculations. Energy and water calculations should follow the design as it develops, not be produced at the end.
5. Design rating. The owner or the party they appoint for Abu Dhabi submissions submits the design documentation as part of the permit process.
6. Construction. The contractor builds to the specified requirements and collects the site evidence the credits require.
7. Construction rating. The completed building is assessed against its design rating.

Estidama vs Dubai's Al Sa'fat

Estidama applies only in the Emirate of Abu Dhabi. Projects in Dubai follow Al Sa'fat, the green building rating system of Dubai Municipality, where Bronze is the minimum tier for new buildings. LEED is voluntary in both emirates and is often pursued alongside the local system. For a side-by-side comparison, read our guide to LEED vs Estidama.

How Optimal Engineering Can Help

For Abu Dhabi projects, our scope is design. We prepare architectural and MEP design documentation, energy and water calculations, and Estidama credit documentation for the project's appointed Pearl Qualified Professional, so the design meets the targeted Pearl level from the start. Submissions to the Abu Dhabi authorities and the construction-stage rating are made by the owner or the party they appoint.

Learn more about our green building design for Abu Dhabi projects, our sustainability certification services and our wider green building consultancy, or contact us to discuss the Pearl target for your project.