The Surface; paint over existing plaster. The paint was done poorly with bubbling and missing areas present. Recommend repainting in the next 1 to 12 months ($1500+). Note that the paint was done over older plaster which may be the main issue as to why the paint did not adhere well versus using a bond coat. The cost to resurface a pool such as this is likely between $8,000 to $12,000 depending on issues present / surface options.
Estimated total: Repainting $1500+ or full resurfacing $8000-12000.

Issues seen at waterfall = water loss coming through the waterfall surface, expect re water proofing ($650-1500+).

Water quality is new freshwater. It will likely need Cyanuric Acid or CYA 10 to 15 pounds which should run less than $100 plus chlorine at around $50 plus it wouldn’t hurt to do a minor phosphate pouch and enzyme treatment for the existing water at around $50 or less so all of that is less than $200 to bring this water chemistry up to a more ideal standard.

The swimming pool has four main drain covers and the spa has two. All six are older and due to be updated for safety at around $100 apiece. There are two skimmers in the pool and then one on the spa. Both skimmers are due to have their floats, floating weir door, weighted basket, and lid all updated ($900 or less).

Recommend minor service ($105 or less) to a recently swamped cleaner service = taken to local pool supply store at no cost + repairs

Working apparently but down for minor clean out and hose add on service ($125+)

The pool light is up next. There are two pool lights likely both color lights, one on the east side and one on the west side of the pool. The one on the west side does not turn on, the one on the east side does turn on but is relatively dim. Both lights are 10 inch and it appears that they are both due to be updated due to age condition and water being present inside the light lens. The cost to update a light can is around $150 up to $1250 each light can depending on quality but to install two lights expect the cost of around $400 labor each so low end 400×2 + 150×2 installed up to high end light would be 1250×2 + install 400×2.

Spa light is the same thing as the previous section except it is just one spa light. It does appear that it’s the same size 10 inch light for the spa so same price range $150 for a low-cost light can up to $1250 for a high-quality LED color 12 V and install is around $400 for the spa light.

The filter is an older filter tank. Its element inside the filter is likely very dirty from the green pool and is due for service $150. At that time you can determine if the element is due to be updated or replaced which it likely is at around $500. Also recommend a new tank O-ring set at around $200 and also a new pressure gauge liquid filled at around $50. These are all minimum needed likely for this filter due to age and condition.

Next is the filter pump. The filter pump is likely original 20 years old or older. It appears we have a leak out of the return connection of the pump. This would be roughly $500 or more to fix correctly if it isn’t split on the pump housing. Additionally the pump was not able to fully prime. This could be a simple pump lid o-ring due for service at around $50. Recommend updating that as well as the pump lid o-ring for $50 or less and the basket for $50 or less. Also note that if the pump has a split in its housing not allowing it to function correctly the cost of a new pump installed is around $1200 for the Pentair Superflo replacement pump $800 for install installation and programming.

The booster pump is like new and it appears to be in working condition, but could not be fully tested because the filter pump was not functioning correctly. Although I do see leaks at the return connections of the pump indicating that it may require $500 or less in plumbing repairs to get the booster pump to be functioning again leak free.

There is a waterfall pump behind the waterfall to the northwest. This pump is working but it is very very hot on its motor indicating that the motor is likely coming to the end of its lifecycle or needs service. If it’s just simple service less than $500. If it’s a replacement time or it’s due to be replaced soon expect to pay $1250 or less for a new motor variable speed installed or in my opinion a better option would be a super flow VS variable speed pump at around $1200 plus $800 for install installation.

Next is the heater. The heater itself is very old. I did not expect it to work judging just by its looks and condition. The cost for a new heater is around $5000 after tax. You’ll pay someone around $1500 to install and remove the old heater.

Next step is the board and timer. It appears that we have all old breakers here. Recommend updating for safety to GFCI variable speed breakers and also recommend updating the breaker for the pool lights to GFCI as well. The plug breaker is GFCI. You’ll pay an electrician around $400-$500 in parts and around $400 in labor.

Valve has suction side and return side valves. It appears they are leaking currently as the filter pump is not able to start or at least prime because of air loss. At minimum the suction side valve will need service ASAP at around $400 but likely all of these valves and plumbing present will need to be serviced at minimum $700 but prefer to be all cut out and replaced at around $1500 to $2500 which will include repainting and relabeling and covering from the sun using UV mesh.