How to Safely Remove a Built-In Fireplace Surround Yourself

Removing a built-in fireplace surround is something many NZ homeowners can tackle themselves — but only after ruling out hazardous materials and understanding which connected work is legally restricted. Done carefully, it's a satisfying weekend project that can open up a room and modernise your home.

Before You Start: Critical Safety Checks

This is the most important step and must not be skipped.

Check for Asbestos

Homes built or renovated before 2000 may contain asbestos in materials around the fireplace — including textured plaster, rope seals, backing boards, and old tile adhesive. Disturbing asbestos is a serious health risk and is regulated under NZ law.

• If your home was built before 2000, assume asbestos may be present until proven otherwise.
• Have a sample tested by an accredited laboratory before any demolition work.
• WorkSafe NZ has clear guidance on identifying and managing asbestos in the home. WorkSafe NZ sets out thresholds and requirements for when a licensed asbestos removalist must be engaged — check the WorkSafe NZ website for current rules, as requirements depend on the type and quantity of asbestos involved.

Check for Lead Paint

Older painted surrounds may contain lead paint. Use a lead test kit (available at Bunnings or Mitre 10) before sanding or cutting any painted surfaces.

Confirm the Fireplace Is Decommissioned

Make sure the fireplace is no longer connected to a gas supply or active flue system. Gas work is restricted work under NZ law — only a licensed gasfitter registered with the Plumbers Gasfitters & Drainlayers Board can disconnect a gas appliance or cap a gas line. Do not proceed until this is confirmed in writing.

Check for Building Consent Requirements

Removing a fireplace surround is generally a cosmetic task that doesn't require a building consent, but if you're removing the firebox, hearth, or chimney breast, or altering the structure, you may need consent. Always confirm with your local council — what qualifies as a Schedule 1 exemption can vary. MBIE Building Performance has useful guidance on consent requirements.

Tools and Materials You'll Need

• Pry bar and flat bar
• Hammer and cold chisel
• Utility knife
• Cordless drill or screwdriver
• Safety glasses, dust mask (P2 rated minimum), gloves, and knee pads
• Drop sheets and heavy-duty rubbish bags
• Stud finder (if patching wall afterwards)
• Filler, plaster, and paint for reinstatement

Step-by-Step: Removing the Fireplace Surround

Step 1 – Protect the Room

Lay drop sheets over the floor and nearby furniture. Seal off doorways with plastic sheeting to contain dust. Old fireplaces can release significant amounts of soot and debris.

Step 2 – Remove the Mantelpiece

Start at the top. Most timber mantelpieces are either screwed into the wall or fixed with construction adhesive, or both.

• Run a utility knife along any painted or caulked edges to break the seal.
• Look for screws or nails hidden under filler or paint — probe with a nail or use a magnet.
• Use a flat bar to gently lever the mantelpiece away from the wall, working gradually along its length to avoid cracking the surrounding plaster.

Step 3 – Remove Side Pilasters and Decorative Trim

The vertical side columns (pilasters) are usually fixed the same way as the mantelpiece. Work from top to bottom, prying gently. Older surrounds may be set in plaster — use a cold chisel to carefully cut through the plaster bond rather than forcing the timber.

Step 4 – Remove the Hearth Surround (if applicable)

Tiled or stone hearth surrounds are often bedded in mortar. Use a cold chisel and hammer to chip away the mortar carefully. Work slowly to avoid cracking floor tiles or damaging the subfloor. Hearth slabs can be very heavy — get a helper.

Step 5 – Make Good the Wall and Floor

Once the surround is removed, you'll likely have:

• Holes, raw plaster, or exposed brick where fixings were
• A visible firebox opening that needs to be sealed or built out

Patch plaster damage with a suitable filler or base coat plaster. For larger areas, GIB plasterboard may be appropriate. Prime and paint to match — Resene and Dulux both offer colour-matching services.

If you're sealing the firebox opening, ensure the flue is also properly capped to prevent downdraft and moisture ingress — this may require a builder or chimney specialist.

Waste Disposal

Dispose of rubble responsibly. Most NZ councils have transfer stations that accept masonry and timber. If asbestos-containing material is identified, it must be double-bagged, labelled, and taken to an approved disposal facility — check with your local council for the correct process.

When to Call a Professional

Call a licensed tradesperson if:

• Asbestos is suspected or confirmed — engage a licensed asbestos removalist.
• Gas is involved — a licensed gasfitter must disconnect and cap any gas supply.
• The chimney breast is structural — removing or altering a structural element requires a licensed building practitioner. Find one at Licensed Building Practitioners.
• Electrical wiring is present — any wiring near the fireplace must be assessed and disconnected by a registered electrician (EWRB).
• You're unsure at any point — a qualified demolition contractor or builder can assess the job quickly and save you costly mistakes.

You can find experienced local demolition contractors and builders on tradedirectory.co.nz.

Sources & Further Reading

• WorkSafe NZ – Asbestos guidance for homeowners
• MBIE Building Performance – Building consent information
• Plumbers Gasfitters & Drainlayers Board – Licensed gasfitters
• Licensed Building Practitioners – Find an LBP
• BRANZ – Building research and technical guidance
• Electrical Workers Registration Board – Find a registered electrician