Kunying Civil Engineering

Kunying Civil Engineering Co., Ltd. provides building demolition and teardown across Bangkok and the surrounding provinces, with over 15 years of experience and 20+ completed projects. Based in Sai Mai district, we also cover Nakhon Pathom, Samut Prakan, Chachoengsao and Suphan Buri. Full team and machinery, free on-site quote. Call 091-770-4447.

Demolition is roughly 150-350 THB per square metre, depending on the number of floors, materials (concrete/wood/steel), site access and debris removal. A single-storey house under 100 sqm is about 80,000-100,000 THB; a two-storey house under 200 sqm about 120,000-180,000 THB. Contact us for a free on-site assessment.

Free demolition is genuine when the value of salvageable materials (old wood, steel structures, scrap metal) exceeds the demolition labour cost, so the contractor offsets one against the other. It suits medium-to-large buildings with good wood or steel and easy site access. We assess for free whether your job qualifies for free demolition or even cash back.

Yes — under the Building Control Act you file form Khor.1 at the local district or municipal office, with copies of your ID card, house registration and proof of ownership. Buildings over 15 m tall, or within 2 m of a neighbouring building, need an engineer's certification. We can handle the permit application for you.

On-site demolition of a residential house takes about 3-7 days; large buildings or factories take 2-4 weeks, depending on size, structure and debris removal. Note that the demolition permit processing time (about 45 working days) is separate from the actual demolition time.

Pricing is by area (square metres) and material type — e.g. roof structure/brick walls 25-30 THB/sqm, timber work 150-250 THB/sqm, plus debris hauling 150-350 THB/sqm. The number of floors, site access and volume of debris to remove all affect the price. We give an accurate quote after an on-site visit.

The price for old wooden houses depends on the wood type (teak fetches the most, then makha/teng), the size of posts, floors, walls and beams, and the wood's condition. Thai-style houses, wooden shophouses, rice barns and hardwood get good prices. Send photos for an initial quote — we pay cash and demolish the concrete structure and foundations for free.

We buy steel structures, steel roof frames, and old warehouses/factories together with demolition. Price is assessed by steel weight and structural condition — ideal for factory and industrial-estate jobs. We can buy, demolish and clear the site end-to-end. Send photos and dimensions for a quote.

Land filling is about 180-480 THB per cubic metre (including compaction), depending on haul distance and soil type. Filling 1 rai to 1 m high needs roughly 1,600 cubic metres. We charge per cubic metre, per truck, or as a fixed on-site quote, serving all of Bangkok and the surrounding areas.

Backhoe rental starts around 3,000-3,500 THB/day for a PC30; a PC60 is about 5,000 THB and a PC200 about 9,000 THB, with an operator. We rent daily and monthly — choose the model by job size. Small excavators suit demolition in tight spaces and urban digging.

Yes. We are based in Sai Mai, Bangkok, and cover nearby areas such as Don Muang, Bang Khen, Lak Si, Saphan Mai, Khlong Sam Wa, Min Buri, Ram Inthra and Lat Phrao, plus the whole metropolitan region — Nonthaburi, Pathum Thani, Samut Prakan — as well as Nakhon Pathom, Chachoengsao and Suphan Buri.

You need two permits — a demolition permit and a construction permit — filed at the district or municipal office, taking about a month, with fees in the low hundreds of baht. The old structure is then demolished, and the site cleared and levelled before new construction. We handle the demolition and permit steps end-to-end.

Yes — under the Building Control Act: up to 3 months' imprisonment, a fine up to 60,000 THB, or both; failing to notify the registrar within 15 days carries a fine up to 1,000 THB. We recommend obtaining the proper permit, which we can arrange for you.

Five steps: 1) survey the site and plan the teardown; 2) install barriers to contain dust and prevent accidents; 3) manually remove salvageable parts first, such as doors and windows; 4) use heavy machinery (backhoe) to demolish the structure and foundations; 5) haul away debris and level the site.

Yes. We bid on both public and private demolition projects, including factories and industrial estates, and auction salvage of buildings, structures and machinery. With an engineering team and 15 years of experience, we handle large contracts and provide corporate documents and reference projects.