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TSG Building Services Plc

Hertfordshire

MCS Certified
MCS
Certified Installer
6
Counties Covered
2
Technologies
1.7
Google (315 reviews)

MCS certificate NIC-1327 · Verify on MCS

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Technologies

Solar PVHeat Pumps

Reviews

1.7(315 Google reviews)

What customers say on

4/5

I have mixed reviews. As a company, they are difficult to get on the phone when you want them, however will be fairly pushy from a mobile when they want to contact. (hurrah for that number, had to use in an emergency) Before xmas I had asbestos removed from loft. Including the insulation and loft hatch. Spent all of xmas/new year absolutely freezing. Eventually get a response and the engineer was shocked to see how it had been left. Tom Hughs - Cambridge... has been AMAZING. He has shown me nothing but politeness and consideration. After he done the first initial survey, he kept in touch day by day, telling me how the order of materials was progressing. He communicated about timings, and showed me flexibility to get time off work, but making the job a priority to get my house warm. Tom Hughs, has been my January hero!

S C9 Jan 2026
1/5

For the past 3 years, they have been coming multiple times every winter with their sub-par "fixes" to our faulty boiler only for it to leak and dysfunction the following winter or sometimes following week, in turn restricting access to heat and hot water. To give a summary: when they do look at a job they claim to be ordering parts, then leave and pass the job over to another "engineer", who says the part is not needed, giving a different diagnoses and the cycle continues with endless calls leading to a temporary fix, only for them to be called a day, a week, or a few months down the line. To this day they have still not fixed the constant leaking from the boiler which occurs during winter months (3 whole years). This month in January 2026 our boiler broke down completely and we were promised a new replacement as soon as possible. We have had no hot water or heating for well over 1 week, not given any heaters, and I have also taken 2 days off from work for their engineers to come, only to be informed that one of them has I quote "called in sick", saying that I will have to wait till the following Monday (reaching almost 2 weeks now of no heat or water now) for a rescheduled appointment and take a 3rd day off from work or arrange a friend for a favour, which again is a major burden, something they are experts at doing: a company specialised in leaving people with these terrible circumstances/burdens.... This company is in shambles as you can see from all the previous reviews inconveniencing most if not all, I'd go far as to say the 1.8 stars listed for this company is a gross overstatement, and warn others of what to expect from TSG.

F30 Jan 2026
1/5

Dreadful, had a new boiler installed about 3 years ago, constant loss of pressure and leaks, many many people turn up to fix it, last 5 mins then breaks down again. 100%not happy with the service. The person who installed the boiler made a complete mess on my walls and ceiling installing random rods to hold it in place. I was told myself to keep turning various switches to adjust pressure etc when it drops which is weekly. Absolute cowboys. Called again tonight as broken again was told 24hours I had to wait in this weather. Called again the lady said someone should definitely be here by 10pm, called again 10mins ago suprise suprise I was put on hold for 10mins and was then told if not tonight will be tomorrow. I requested heaters but that's also to much for them.

Lynsey Mackay18 Feb 2026
5/5

My gas engineer was called Conrad and I couldn't have been happier with his work his customer service and basically all round genuine regard to the welfare of myself as a tenant being without heating and hot water, unfortunately a part was needed to be ordered and after apologizing he assured me that he himself will be the engineer to attend the following visit and make sure no stone was left unturned and I will be back up and running. Very lovely man so deserved a review. Thanks Conrad much appreciated

James3 Dec 2025
1/5

Had a boiler installed by TSG on behalf of LBH, next day an electrical engineer attended and whatever he had done stopped the boiler working. Sent an emergency engineer who just removed a part and said it would work and it did not. Engineer was booked for the next day, the engineer did not attend and was told after taking a day off work he was ill, no communication or call. Been told an emergency engineer will attend but probably not fix it, so left from Thursday and over the weekend with no heating and poorly performing immersion heater for a family of 4 with two young children and one medically vulnerable

Sean Healy14 Nov 2025

What customers say on Trustpilot

3/5

Well done Ross

We had TSG plumber Ross, round today to replace our toilet and bathroom. He has done an exceptional job. Was polite, cleaned up after his work. He communicated well with us to explain what was being done, asked which colour floor tiles we wanted. Can't recommend him enough. Well we tried the bath today, to have a shower, unfortunately found the bath narrower than our old bath, we both feel unsafe standing in the bath

Michael14 Jan 2026
1/5

At owners risk!

Feel free to use this company if you want to be let down on more than 1,2 or even 3 occasions. Absolutely terrible service. The engineers constantly do not turn up and when you call customer services they give numerous excuses. Be prepared to be let down!

Catherine Osmani12 Dec 2025
1/5

absolute cowboys

absolute cowboys Dartford borough council are not much better for using this company they only used to do the gas side but now Dartford council use the building side of this company as well never want them in my house again I've been left with no heating in my living room they have broken my range cooker in the past they have chipped my plaster fire place they have completely destroyed my walls and plaster ceiling rose doing a rewire lots more also shame on you Dartford Borough Council

gemma22 Nov 2025
1/5

Received a letter informing me the gas…

Received a letter informing me the gas boiler was due for inspection, I called then to explain I had an appointment that day and could I arrange a different date. I phoned the company and a women answered, I explained I was out of town on the date, she replied you can't cancel the appointment because you don't have an appointment. I said I have your letter here, she said angry YOU DON'T HAVE AN APPOINTMENT! and that was the end of the phone call.

ANALYST25 Sep 2025
1/5

I've worked for this company and can't…

I've worked for this company and can't believe what a horrible nasty bunch they are ,I hurt myself working for them and only thing they cared about was me signing something to put them in the clear,when I was given no training whatsoever,the guy in charge Bryan is a Wiesel and is such an outdated character ,apart from all that this company cuts corners with really serious stuff ie asbestos,and when there is children in properties the have no regard for safety and wellbeing avoid all this joke of a company at all costs

Paul Alacorte19 Jun 2025
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FAQs About TSG Building Services Plc

Is TSG Building Services Plc MCS certified?

Yes. TSG Building Services Plc is registered under the Microgeneration Certification Scheme (MCS) (certificate number NIC-1327). MCS certification is required for your installation to qualify for the Smart Export Guarantee (SEG) and confirms the work meets recognised UK standards for safety and quality.

What areas does TSG Building Services Plc cover?

TSG Building Services Plc serves Hertfordshire and 5 other counties across the UK. You can see the full list of counties covered on this profile.

What does TSG Building Services Plc install?

TSG Building Services Plc installs Solar PV, Heat Pumps. Every project should include a free survey, a detailed written quote, and installation by MCS-certified engineers.

How is TSG Building Services Plc rated?

TSG Building Services Plc holds a Google rating of 1.7 out of 5 from 315 reviews. You can read reviews and compare against other installers in Hertfordshire on this page.

How much do solar panels cost in Hertfordshire?

A typical 4kW domestic solar PV system in the UK costs around £6,600 to £8,500 installed, with a payback period of roughly 11 to 13 years. Your exact price depends on system size, roof type, and whether you add battery storage. Compare quotes from installers covering Hertfordshire to get accurate figures for your home.

Does TSG Building Services Plc install heat pumps?

Yes. TSG Building Services Plc installs air source heat pumps in Hertfordshire. A typical air source heat pump installation costs around £8,000 to £14,000 before any grant. In England and Wales the Boiler Upgrade Scheme offers a £7,500 grant towards the cost, which an MCS-certified installer can apply on your behalf.

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