Renovating a Townhouse in Antwerp: Permits & Insulation

1. The unique character and challenges of Antwerp townhouses

Antwerp possesses an extraordinary heritage of late 19th and early 20th-century townhouses, particularly in neighbourhoods such as Zurenborg, Het Zuid, Harmonie, and Berchem. These properties boast high ceilings, grand staircases, intricate ceiling rosettes, and exposed brick arches. However, they typically suffer from outdated electrical infrastructure, absent thermal insulation, and sagging timber floor joists.

2. Insulating while respecting architectural heritage

Because street-facing facades in historic Antwerp districts are protected or define the urban aesthetic, external EPS insulation is usually forbidden. Significant energy improvements are achieved through three targeted interventions: 1) High-performance roof insulation (at least 18-22 cm PIR or mineral wool), 2) Basement ceiling insulation to arrest rising chill, and 3) Custom timber or slim aluminium joinery with acoustic double glazing mirroring original window divisions.

3. Structural interventions: steel beams and modern open-plan living

Historic townhouses were originally designed as a succession of enclosed reception rooms. Modern homeowners, however, desire flowing open spaces connecting the kitchen, dining area, and city garden. Removing load-bearing partition walls demands structural steel HEA/HEB beams sized to support the multi-storey loads above.

• Thorough structural assessment of basement masonry footings
• Engineering calculations by a registered structural engineer
• Professional temporary propping before any demolition commences
• Acoustic floor decoupling to dampen footfall noise between levels

4. Restoring authentic interior craftsmanship

At Van den Broeck Renovaties we combine cutting-edge building science with traditional restoration. Original oak herringbone parquet is sanded, repaired, and finished with durable matte oils. Damaged plaster cornices are recast using silicone moulds, and marble fireplaces are integrated seamlessly into contemporary interior designs.

5. Planning, budget and regional subsidies

A comprehensive townhouse renovation in Antwerp typically spans 4 to 8 months and requires an experienced general contractor who coordinates all trades strictly. Homeowners benefit from the reduced 6% VAT rate and substantial Flemish energy subsidies.