Gustavo Penna Wraps an Accounting Firm's Corner Headquarters in Lagoa da Prata with 12 Kilometers of Brise-Soleil

New districts in small Brazilian cities rarely get buildings that try to anchor them. Plots are sold, roads are paved, and the first structures tend to be provisional in spirit, whatever their construction. The Patrimonium Headquarters, completed in 2024 by Gustavo Penna Arquiteto e Associados in a still-forming part of Lagoa da Prata, Minas Gerais, works against that pattern. It is a single upright volume on a corner lot, built for Patrimonium Contabilidade, one of the state's largest accounting firms, and meant to read as permanent before the neighborhood around it has settled.

What makes the project worth your attention is how much engineering sits behind its apparent simplicity. About 30 kilometers of prestressing tendons run through the reinforced concrete frame, so the 1,884 square meter building needs only six visible pillars and gets free spans of up to 9 meters. Wrapped around that frame is roughly 12 kilometers of brise-soleil. One system frees the floor plates; the other turns the facade into a continuous filter. Together they produce a workplace for about 200 people that reads as one open room stacked on itself.

A Corner Volume Facing the Horizon

The massing is deliberately reductive: a squared-off block that faces the open view and lets the corner do the civic work. In a district without a strong street wall, a single tall object becomes a reference point, and the team clearly understood that. Seen through palms or across misty grass at dawn, the building holds its edge without leaning on surrounding context, because there is very little context yet to lean on.

We think the restraint is the right call. A more expressive form would date quickly in a neighborhood whose character is still undecided. A calm, uniformly clad volume gives the area something to calibrate against.

The Cut at the Base

The one gesture that breaks the box happens at ground level. A diagonal, glazed cut slices beneath the slatted volume, so the upper mass appears to hover over a transparent, angled base. The move does two jobs: it marks the entrance without a canopy or signage, and it lightens the heaviest part of the composition exactly where pedestrians meet it.

The landscape around this cut stays modest: a hedge, a planted bed, herringbone brick paving, a grassy slope held by a concrete wall. That modesty keeps attention on the incision itself. The prestressed structure is what makes this possible; with few columns to accommodate, the base can be carved rather than simply framed.

Twelve Kilometers of Slats

The brise-soleil is the building's identity, and its scale is easy to miss because it is so consistent. Horizontal slats run uninterrupted around the volume, erasing the floor lines and turning the tower into a single textured surface. Looking upward, the lines compress into a fine grain; from across the street, they read almost as a woven material.

Sun control is the obvious justification in central Minas Gerais, but the skin also solves an urban problem. Office buildings in small cities often expose a scatter of blinds, signs and air conditioning units. A continuous screen hides the inevitable clutter of a working accounting office and presents one coherent face to the district.

A Lantern After Dark

At dusk the logic flips. Interior light seeps through the slats and the opaque-looking block becomes a lantern, with the lit entrance terrace glowing at its foot. The row of motorcycles parked along the street is a useful reminder of scale and setting: this is a working building in an interior town, not a corporate campus, and its presence after hours is part of how it claims the corner.

Inside the Filter

Inside, the brise becomes a daylight instrument. Walkways run along the full-height glazing, and the slats throw striped shadows across timber floors that shift through the day. The circulation sits at the perimeter, so staff move through the most animated light while desks occupy the calmer depth of the plate.

The concrete columns are few and deliberate, and the glass balustrades keep sightlines open between levels. You can stand on an upper walkway and see colleagues below, the screen beside you and the road beyond. For an office of 200, that visual continuity matters more than any amenity; it makes the firm legible to itself.

The Atrium and the Long View

A glass-edged void cuts vertically through the stacked floors, linking lounge areas with round tables and blue chairs to the work levels above. The large pale ducts are left exposed rather than concealed, an honest choice that suits the frank structural language elsewhere. Sunlight reaching down the atrium carries the slatted shadow pattern deep into the plan.

At the corners, the screen opens up. A meeting area with floor-to-ceiling glass frames a view of the lake, softened by the louvers rather than cropped by them. It is the payoff for facing the horizon: the building gives its occupants the same long view it offers the district in return.

Plans and Drawings

The drawings confirm what the photographs suggest. The site plan sets a long rectangular footprint between two streets, with parking and a timber viewing terrace. The ground floor collects reception, lounge and a reflecting pool along the corner, while the upper levels organize team desks around a central void, with a meeting room, pantry, a green roof garden and an open terrace at the top.

The longitudinal section is the most revealing sheet: it shows how the floors step with the sloping site and how the glass lift core threads through them. The elevation reduces the whole project to its essentials, a louvered box with a single diagonal glazed cut.

Why This Project Matters

Patrimonium Headquarters shows what a regional office building can do when structure and envelope are designed as one argument. The prestressing is not a technical flourish; it is the reason the plates are open, the base can be cut, and the screen can run continuously. The brise is not decoration; it is climate control, privacy and civic identity at once.

It also makes a case for building permanence early. New districts in interior Brazil tend to get placeholder architecture. Gustavo Penna's team instead gave Lagoa da Prata a fixed point, a calm and carefully engineered object that sets a standard for whatever rises around it. That is a responsibility more private clients should be willing to take on.

Patrimonium Headquarters by Gustavo Penna Arquiteto e Associados, Lagoa da Prata, Minas Gerais, Brazil. Area: 1,884 m². Completed: 2024. General contractor: Hausen. Photography by Jomar Bragança.

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