For "first time" in a while nice job! Having fun getting under the hood again? Wordpress is awesome opposed to how you did them back then huh? I don't think this is ready for sale or presentation though.
Know up front I am rifling through making quick notes. If it says "change" something it doesn't literally mean you "need" to go do this. It is quick notes that are crude which I am not going to clean up to be politically correct or the like. Take everything with a grain of salt...
Home page
* slider - contact us - I would remove this completely. If they want to contact you, anyone in 2017 knows how to do that on a website. Remove it completely. Also best practice isn't "click the button below" anymore that's dated. Slider in general is not creative and does nothing to invite me in.
See Some of our Work - reword this and make it more simple
* Don't use thumbnails. Use a slider with arrows on side for users to rifle through pictures giving them more speed and control. Nobody is going to spend the time clicking on every one of those pictures (links) doing that.
* Don't have "see some of our work" and then "some of our work" right below it. Not aesthetically correct.
"If" you are going to use "success stories," and you are limited info on your cover page, place it on the front page. Use white space more appropriately and get it on the cover. I would put those in the slider before I put "contact us", but I also wouldn't put "success stories" in the slider either. Don't use the slider just because it is there, but use it for best practice and inviting users in deeper.
Our Services - way too much going on in there. These should be simple, to the point, and all about the same size in content. I would get rid of half of this.
About us
* Sounds like sales pitches rather than history and truly about who you are. Too many "we take great pride" stuff and not enough SEO thought put into it and throughout the site.
* Didn't like the "no job too big or small" introduction. If I am looking for skilled people to do a "big" job for me, I am coming there already assuming you can do it and don't want to question this up front. This sounds like the "little engine that could" sales pitch instead. Don't even plant the seed in their mind or begin to get them to wonder or think along these lines. YOU are the PROFESSIONAL...of course you can!
Contact us page
* Don't need email "AND" contact form. One or the other, preferably contact form. Center contact form, make it more predominate in white space and have it dominate the page. That is what they are on that page for.
Meet the team
* I wouldn't call a "laborer" the "team." Looks like lacking leadership, professionals, mom and pop, etc... pics look staged, boring, and a bit creepy to be honest
Portfolio is boring and not inviting. I wouldn't stop here unless I had to. Slider of pictures at the least.
Find out what we are all about on home page in middle of page - this is a bottom border at least and a bad break of white space. I wouldn't use this style in the "middle" of a page versus at the bottom. Throws white spacing off on your front page completely.
It looks totally amateur which is OK because you said that up front. Trying to find the balance between white space and content is the biggest challenge we have when first building. The best thing I would suggest is go look at competitors and literally "steal" what they are doing on their sites. Literally. It's the best way to do it and why recreate the wheel? As you get an idea for where they are putting "success stories", in their sliders, etc... it will become automatic to you. This is the boring part of it at first, but when you start to get more of an eye for what others are doing, your eye will automatically start looking for best practices and what looks the best. Then you can focus more on content, writing/seo, images, etc...
If you are planning on doing this moving forward, you might want to find someone who can "write" professionally and could audit the site from that perspective. Have friends that love to write or good with literature? Get them to start writing or proof reading things for you. For those of us, myself include, that aren't professional writers, we tend to try and make it sound better with key words rather than communicating with our target audience effectively. Words like "best, pride, skilled," etc...
This was a quick run through and initial thoughts. Hope it helps some.
Forgot to upload screen shots...here they are hopefully.