If you spot a swarm of police swoop on a property near you, there's a good chance they have just found a cannabis factory.

They have been frequent discoveries in Swansea Bay properties in recent years.

From terraced homes to boarded-up former pubs and even industrial units, police have raided multiple buildings over the last year and a half and have been greeted by hundreds, if not thousands, of cannabis plants once inside.

Read more: The number of people caught with cannabis in and around Swansea this year and how much it cost them

Many have been filled with the Class B drug over several rooms and floors, and kitted out with growing equipment, while the people behind some had tampered with the electricity supply.

These are some of the places throughout Swansea Bay where cannabis factories have been discovered since the beginning of 2020.

Eaton Crescent, Uplands

The cannabis factory was found inside a property in Eaton Crescent

More than 900 cannabis plants were growing over four storeys at an end-of-terrace property in Eaton Crescent in Uplands.

Police turned up to raid the property in May this year but instead two men working inside unexpectedly opened the door. The Albanian nationals, Elis Metaliaj and Nuri Shehu, were arrested on the doorstep and said they had paid people traffickers to smuggle them into the UK.

A total of 915 plants of various stages of maturity were found inside the property, as well as the associated growing equipment. Officers also found the garden path had been dug up and the electricity cable running into the house had been tapped into.

Metaliaj, aged 21, and Shehu, aged 25, both of no fixed abode, were sentenced to 12 months in prison.

Sandringham Park, Llansamlet

South Wales Police found 2,000 cannabis plants in Llansamlet on Christmas Day

Police came across around 2,000 cannabis plants inside a building after responding to reports of a break-in on Christmas Day in 2020.

Officers from South Wales Police had initially been responding to reports of youths in the building in Sandringham Park, Llansamlet when they came across the large amount of Class B drugs.

The cannabis plants were being kept in a building off a car park in Sandringham Park and it is believed that around 10 people were involved. It was described by the force as a "sophisticated cannabis factory".

Isaac's Place, Aberavon

The factory was discovered in a former commercial unit in Isacc's Place

Around 800 plants were discovered in former industrial units in Port Talbot in January this year.

South Wales Police attended old commercial premises in Isaac's Place, in Aberavon, where they recovered the large number of plants. An eyewitness described seeing "about eight police vans" in the area at the time of the raid.

Hawthorne Avenue, Uplands

More than 700 cannabis plants were found inside the Uplands property

More than 700 cannabis plants were found inside a house in Uplands during a police raid.

In August last year, officers from South Wales Police found the cannabis factory while carrying out a warrant at a property in Hawthorne Avenue in Uplands.

The force issued a warning at the time about the "huge amount of damage" cannabis factories could cause to residential properties.

Station Road, Port Talbot

Some of the plants discovered at the property in Station Road

750 cannabis plants were seized from a house in the Sandfields area of Port Talbot in December.

Officers acting on intelligence first received by PCSOs used a warrant to enter the property in Station Road where they made the discovery. The plants were at different stages of growth and they also came across specialist equipment for growing cannabis.

A 30-year-old man was arrested in connection with the discovery.

Sterry Road, Gowerton

The cannabis plants which were found inside the property by the fire service

Firefighters discovered a huge cannabis factory when dealing with a fire in Gowerton last year.

Emergency services were called to the blaze in Sterry Road in October but when they entered the former pub and gym they found 700 cannabis plants inside.

The fire broke out on the first floor of the three-storey building, with Mid and West Wales Fire and Rescue Service sending crews from Swansea West, Swansea Central, Llanelli, Tumble, Gorseinon, Carmarthen, Morriston, Pontardawe and Port Talbot.

Carmarthen Road, Gendros

Police found a 'significant' cannabis factory in Gendros

A "significant" cannabis factory was found inside a house in Carmarthen Road in July last year.

Officers from South Wales Police attended the property following a report that it was unsafe and discovered 200 plants and growing equipment inside.

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Pentregethin Road, Ravenhill

Police found a 'nursery' of young plants

Police were called to a "sophisticated" cannabis farm in Ravenhill shortly after a gang had raided the property.

South Wales Police had responded to reports of a disturbance and possible burglary at the house in August, 2020 – and instead found a drug growing-operation which had taken over the whole building.

A total of 274 plants were recovered from the house, including a number of young plants in a "nursery section", while the electricity meter had been bypassed and four rooms had been fitted out for cultivation with lights and reflectors, fans, an air filtration system, and watering equipment.

Police estimated the potential yield from the crop the defendant had been tending was almost 23kg and that it could be worth more than £230,000.

Mountain Dew pub, Mount Pleasant

A cannabis factory discovered in the former Mountain Dew Inn pub in Mount Pleasant

A cannabis farm was found inside a disused pub near Swansea's main police station.

Police went to the boarded-up Mountain Dew Inn pub in Mount Pleasant in May, 2020, after people living nearby reported suspicious activity around the building.

After entering the property they came across 190 plants of various stages of maturity, along with associated growing equipment, spread over six rooms. The electricity supply to the disused pub had been bypassed. The potential value of the plants was estimated to be at least £50,000.

Wyndham Court, Llansamlet

Police at the industrial estate

Police discovered a "significant" cannabis factory in a unit on a Swansea industrial estate in February last year.

South Wales Police attended Wyndham Court, in Llansamlet, which is within Swansea Enterprise Park, after receiving information from the public.

The force confirmed at the time that a "significant" amount of the Class B drug had been located within the unit.

North Hill Road, Mount Pleasant

Police found this inside a Swansea house

Police raided a house in Mount Pleasant in May last year and discovered a "substantial cannabis factory" inside.

A 25-year-old man was arrested in connection with the cannabis factory in North Hill Road which contained more than 250 plants spread over three floors.

One passer-by described seeing "around five police vehicles" and "at least 10 police officers" outside the house at the time of the drugs warrant.

Talbot Road, Port Talbot

Officers from South Wales Police were responding to reports of a burglary when they made the discovery

Police discovered a cannabis factory inside a house after responding to reports of a burglary in November.

After entering the property in Talbot Road they came across more than 50 plants, as well as growing paraphernalia. The occupants of the property ran away as police arrived at the address.

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Pontardawe

Four people were arrested by police on suspicion of being concerned in the supply of cannabis following a morning of action in Pontardawe in November.

Over 350 cannabis plants were found at an address in Llanguicke Road, Ynysmeudwy, where a 26-year-old man was arrested. While a further 70 plants were found at a property in Tanydarren, Cilmaengwyn, where a 35-year-old man was arrested.

Meanwhile, a 51-year-old woman and a 42-year-old man were arrested on suspicion of being involved in the production of Class B drugs at a property in Pontardawe Road.

South Wales Police said a large quantity of cash and other assets were seized as part of the investigation.

Drummau Road, Skewen

Officers found around 100 cannabis plants at the property

Around 100 plants were found during a drugs warrant in Drummau Road in June, 2020.

Officers from South Wales Police's neighbourhood policing team in Skewen confirmed that they had carried out a "positive drugs warrant" following information from members of the public.

Gordon Road, Port Talbot

The cannabis farm found at an address in Gordon Road in the Sandfields area of Port Talbot

Following an intelligence-led operation, police raided a property in Gordon Road in the Sandfields area of Port Talbot.

Officers discovered a large quantity of cannabis plants being cultivated at the property in March this year. The force said the house had been made safe and that the plants were removed.

Hebron Road, Clydach

The cannabis plants which were discovered by police

A cannabis farm was discovered inside an old, disused pub in Clydach.

Officers discovered more than 100 plants inside 31 Hebron Road, the former New Colliers Arms, which had been empty for several years.

South Wales Police thanked the local community for providing information that led to the discovery in September, 2020.

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