Sustainable Construction in Florianópolis: Solar Power, Certifications and Value

Efficiency has stopped being a marketing footnote and become a real driver of cost and value in property. In Santa Catarina, where winter is felt and electricity tariffs keep climbing, the conversation is very concrete.

Solar: Santa Catarina and Florianópolis out in front

Brazil closed 2025 with roughly 64 GW of accumulated solar capacity — around 24.5% of the electricity mix. Santa Catarina ranks among the leading states, with about 1.4 GW of distributed generation and more than 113,000 connections (April 2025), and Florianópolis tops the municipal ranking for distributed generation, with more than 800 MW installed. Celesc's 13.53% tariff increase in August 2025 only strengthens the case for generating your own power.

Lei 14.300 and the "Fio B"

Lei 14.300/2022 (the legal framework for micro and mini distributed generation) formalized the compensation system and introduced a phased charge on the distribution component of the energy fed back into the grid (the "Fio B"): 45% in 2025, 60% in 2026, and rising through 2029. Systems with a connection request filed by January 6, 2023 keep the previous rules until 2045. For anyone installing today, the payback period the industry typically cites is around 3 to 5 years, though the transition is gradually stretching it.

Certifications and labeling

In 2024 Brazil certified 125 LEED projects (more than 2 million m²), leading Latin America by number of projects. Three labels coexist: LEED (Location, Energy, Water, Materials, Indoor Air Quality; from Certified to Platinum), AQUA-HQE from the Vanzolini Foundation — with its residential Selo AQUA program — and the IFC's EDGE, which requires at least 20% savings in energy, water, and embodied energy in materials. At the federal level, the PBE Edifica ENCE label (Inmetro) grades from A to E under the INI-R method since 2024.

Does it add value?

The most rigorous evidence is international: U.S. studies credit LEED buildings with roughly 25% lower energy use and lower maintenance costs. In Brazil, the "green premium" percentages on price circulate in industry coverage but not in primary studies, so they're best treated as estimates. What is measured is the demand: a 2024 survey found that 29% of buyers in the major capitals would pay more for a property with environmental certification.

Local incentives

Florianópolis offers the "IPTU Sustentável" (up to a 5% discount) for criteria such as water reuse, rainwater harvesting, and individual metering — solar power is not among the listed criteria. At the state level, Lei 18.821/2024 requires rainwater harvesting systems in certain developments.

Sources

• ABSOLAR — Brazil's solar capacity 2025; Governo de SC / ANEEL — distributed generation in Santa Catarina.
• Lei 14.300/2022 (Planalto); ANEEL — "Fio B" transition.
• GBC Brasil / USGBC — 2024 LEED ranking; Vanzolini Foundation — AQUA-HQE; IFC — EDGE.
• Inmetro / PBE Edifica — ENCE label and INI-R (Portaria Inmetro 309/2022).
• USGBC — green building benefits (U.S.); Offerwise — 2024 demand survey.
• ANEEL/Celesc — August 2025 tariff increase; Prefeitura de Florianópolis — IPTU Sustentável.