I need your opinion on my website template for offline companies

Hmmm.. I think your website looks nice and shows its objective firmly.
Well, I suggest that you make your logo a little bit bigger for branding purposes. The whole layout looks good, how it's arranged from the slideshow to the Contact Us part. I think it's better if your make this website a simple parallax website.
The colors are also nice, the moss green brings a kick to the site.
For the Testimonials section, I guess you could add pictures of the building you've constructed or before and after pic if it's a renovation project.
Just my two cents

design fully completed but site taking heavy load while opening reduce image size for better site speed.

I think it "looks" nice, modern. Good design. But frankly, if this is for offline clients, your doing them a disservice because the layout is make to pretty or cool, it's not made to do business.

I say that because, on my monitor, the entire above the fold space is a image slide show. Not saying that is necessarily bad, but for an offline business, it needs to be selling their business. That section in the most important real estate for any website and that needs to be where the site does the most marketing. At the very least it needs to persuade the visitors to inquire or start up a relationship.

Sadly, most offline businesses don't understand this. They see pretty and they think it's good. They think that is what they should have.

What is the main goal of a handyman/construction website? To get more business. I'd rather have a plan of ugly site that brings in business, than one that looks hip.

And really, this can be a big selling point for offline clients, do you want something "pretty" or something that brings you more business?

Sorry, not knocking your design, not trying to be negative.

Of course, just my opinions.

I think it looks nice...but I agree that if the goal is a website to gain business it misses the mark. Think in terms of functionality. When a visitor shows up are they going to want to know the history and structure or how to contact them, services offered and business times and contact person. If those are the focus they need to be central to the design. It does look nice but just like biology form equals function.

It looks nice, modern, super. Good design with image size optimization no need to be doubt. Again it's wonderful