Who do I check with to find out if it is okay to hack a wall in a shophouse?

If you are considering hacking a wall in a shophouse in Singapore, especially if the shophouse is a conserved building, you need to obtain the necessary approvals from the relevant authorities.

1. Urban Redevelopment Authority (URA): For conserved shophouses, any internal or external renovations, including hacking walls, require written approval from the URA. You need to submit an application through URA's e-Services for Category 3 Works for Conserved Buildings.

2. Building and Construction Authority (BCA): You may also need to comply with BCA regulations. Ensure that the proposed works do not affect the structural stability or integrity of the building. If necessary, you may need to submit plans and obtain approval from BCA.

3. Professional Consultants: It is advisable to consult with a registered architect or professional engineer who is familiar with the conservation guidelines and building regulations in Singapore. They can help you navigate the approval process and ensure that your plans comply with all the necessary regulations.

Before commencing any work, it is crucial to get the approvals to avoid any potential legal or regulatory issues.