Green building certifications: LEED, EDGE and what each one measures

The minute

• LEED (US-based) assesses energy, water, materials and indoor environmental quality, across 4 certification levels
• EDGE (IFC/World Bank) requires only 3 minimum savings targets (energy, water, materials), simpler and cheaper
• AQUA-HQE (French system adapted for Brazil) has 14 categories and is more common in corporate and residential buildings there

Why it matters: Choosing the wrong certification for a project’s size and budget often costs more in consulting than the building later saves in energy.

LEED

The most globally known, with Certified, Silver, Gold and Platinum levels. It is administered by the U.S. Green Building Council (USGBC) and certified through GBCI (Green Business Certification Inc.). The system uses a points-based scorecard: projects earn credits across categories such as Sustainable Sites, Water Efficiency, Energy and Atmosphere, Materials and Resources, and Indoor Environmental Quality. The total determines the level. It covers a wide range of criteria, which demands more documentation and specialised consulting.

Because the credit menu is broad, design teams must decide early which credits to pursue. Adding credits after the design phase is locked usually means redesign costs that exceed the value of the certification upgrade.

EDGE

EDGE (Excellence in Design for Greater Efficiencies) was created by IFC, a member of the World Bank Group, to speed adoption in emerging markets. It requires only 3 minimum savings targets (typically 20% in energy, water and embodied energy in materials compared to a local baseline), with a faster and cheaper process than LEED. IFC provides a free software tool that models projected savings against a country-specific baseline, which reduces the need for external energy consultants at the feasibility stage.

EDGE also offers an advanced tier that raises the energy threshold and introduces a zero-carbon-ready requirement, giving developers a pathway beyond the entry level without switching to a different system.

AQUA-HQE

An adaptation of the French HQE (Haute Qualité Environnementale) certification for Brazil, managed by Fundação Vanzolini. Its 14 categories are grouped into four families: eco-construction, eco-management, comfort and health. Topics range from construction site management to acoustic comfort. It is common in Brazilian residential and corporate developments, partly because the auditing process and documentation are conducted in Portuguese.

How to choose

A small project or tight budget tends to fit EDGE better; a corporate project with international appeal tends to seek LEED; the Brazilian residential market often uses AQUA-HQE. Multinational portfolios sometimes face pressure to certify under more than one system because investors in different regions recognise different labels.

Step by step: how certification works in practice

The sequence below applies, with minor variations, to all three systems.

1. Pre-assessment. Before committing, the team runs a feasibility check: which credits or targets the project can realistically meet given site conditions and budget. For EDGE, this step can be done in the free software tool. For LEED, teams often hire a LEED Accredited Professional to map viable credits.
2. Registration. The project is registered with the certifying body (GBCI for both LEED and EDGE, Fundação Vanzolini for AQUA-HQE). Registration locks the version of the standard that will apply.
3. Integrated design. Certification targets must be embedded during the design phase, not added later. Architects, engineers and the contractor review each requirement together so that specifications, material choices and mechanical systems align from the start.
4. Documentation during construction. The team collects evidence (material invoices, commissioning reports, site photos, test results) as work progresses. Retroactive documentation is the single largest source of delays and extra consulting fees.
5. Submission and review. The compiled evidence is submitted for third-party review. Reviewers may issue comments requesting clarification or additional proof. The team responds, and once all items are resolved, the certificate is issued.

Brazil: local rules and incentives

No green building certification is a general legal requirement in Brazil. However, several municipalities offer fiscal or zoning incentives for certified buildings. São Paulo’s IPTU Verde programme, for example, grants a discount on the annual property tax for buildings that meet defined sustainability criteria, which include holding a recognised green certification. Other cities, including Rio de Janeiro and Salvador, have introduced similar mechanisms tied to local legislation.

Separately from voluntary certifications, Brazil operates PBE Edifica, an energy labelling programme managed by INMETRO. It rates buildings from A (most efficient) to E (least efficient). The label is mandatory for new federal government buildings and voluntary for private ones. PBE Edifica does not replace LEED, EDGE or AQUA-HQE, but a high energy label can supply supporting evidence for credits inside those systems.

The most common mistake

Starting the certification process after the architectural design is already finished. At that point, changing window specifications, insulation levels or mechanical systems to meet targets means redesign and rework. Teams that treat certification as a final-stage add-on almost always spend more on consulting corrections than they would have spent integrating the requirements from the beginning.

What is still unresolved

Certified buildings sometimes consume more energy in operation than their design models predicted. This gap between modelled performance and actual performance is documented across multiple markets and certification systems. Some newer versions of these standards now require operational data reporting after occupancy, but enforcement remains inconsistent. Until the industry closes this gap, a certificate confirms that a building was designed to save resources, not necessarily that it does so every year.

Frequently asked questions

Does green certification make construction more expensive?
It usually adds design and consulting cost, though part of it is recovered in energy and water savings over the building’s operation.

Can an existing building be certified?
Yes, both LEED and EDGE have versions for existing building operations, alongside the new-construction version.

Is any of these mandatory in Brazil?
None are a general legal requirement; some municipalities offer tax or zoning incentives for certified buildings.

Read next: what ESG means.

Read next: renewable energy for companies.

Primary sources: LEED rating system (U.S. Green Building Council, 2026); EDGE certification levels (IFC, 2026); AQUA-HQE certification, in Portuguese (Fundação Vanzolini, 2026); PBE Edifica building energy labelling programme, in Portuguese (Inmetro/Procel, 2026).