Our 6 ‘Best Buys Now’ Shares Image source: Getty Images Access this special “Green Industrial Revolution” presentation now When looking for the best shares to buy, my starting point is FTSE 100 stocks. I’d aim to build a balanced portfolio of between 10 and 20 blue-chips, over time. I reckon these three are worth a look.House prices are booming and so is the housebuilding sector. I think one of the best shares to buy in this sector is also the biggest, Barratt Developments (LSE: BDEV). Earlier this month it increased full-year expectations, as it completed more homes and sold them for higher prices. Today’s high demand looks set to continue, even after the stamp duty holiday expires.5G is here – and shares of this ‘sleeping giant’ could be a great way for you to potentially profit!According to one leading industry firm, the 5G boom could create a global industry worth US$12.3 TRILLION out of thin air…And if you click here we’ll show you something that could be key to unlocking 5G’s full potential…My worry is that rising building costs will eat into profits as commodity prices spiral, while supply chain issues could slow completions. Unemployment could rise once furlough ends, making buyers feel poorer.However, with the new-build market underpinned by the government-backed Help to Buy scheme, Barratt’s valuation of just 10.7 times forecast earnings and forward yield of 3.7% (covered 2.4 times) look tempting to me.This also looks like one of the best shares to buyPrudential (LSE: PRU) also merits a place on my list of best FTSE 100 shares to buy, in part due to its low valuation of just 12.6 times forward earnings. The insurer is now focusing on fast-growing Asian and African markets, offering a vast untapped market of the middle-classes look to build and protect their wealth. The opportunity is huge.Share price growth has been strong lately with the stock up 43% in a year. There’s a danger it may idle after posting such quick-fire growth, despite that low valuation. Another potential concern is that Prudential’s negligible dividend leaves investors relying on growth. A planned $3bn equity raise aimed at reducing debt and funding opportunities could dilute the stock.Despite this, sales are accelerating both in Asia and Africa as they emerge from the pandemic, so there’s a vast opportunity for investors willing to be patient.FTSE 100 growth stockI also rate quality assurance provider Intertek Group (LSE: ITRK) as one of the best shares to buy on today’s FTSE 100. Yesterday, it reported “solid” revenue growth of 2.7% year-to-date, speeding up in March and April when revenues jumped 9.3%. Sales are still below 2019 levels, but the group remains on track to hit this year’s targets. My concern is that the stock is expensive, trading at 30.9 times earnings. Recent growth has been good, but not that good. Especially since the yield is just 1.8%.However, I think it’s a strong long-term opportunity as Intertek seeks new outsourcing opportunities in the $250bn global quality assurance market. It should also benefit from the global push to net zero carbon as companies battle to prove supply chains are clean.I don’t expect instant success, but I never do when hunting down the best shares to buy. Instead, I prefer to focus on the long-term story and that remains promising. With all three stocks, I might wait to buy them on the dips. I also rate these. Simply click below to discover how you can take advantage of this. I would like to receive emails from you about product information and offers from The Fool and its business partners. Each of these emails will provide a link to unsubscribe from future emails. More information about how The Fool collects, stores, and handles personal data is available in its Privacy Statement. Enter Your Email Address Best shares to buy: I’d build my portfolio on these 3 FTSE 100 stocks Harvey Jones has no position in any of the shares mentioned. The Motley Fool UK has recommended Intertek and Prudential. Views expressed on the companies mentioned in this article are those of the writer and therefore may differ from the official recommendations we make in our subscription services such as Share Advisor, Hidden Winners and Pro. Here at The Motley Fool we believe that considering a diverse range of insights makes us better investors. Harvey Jones | Thursday, 27th May, 2021 | More on: BDEV ITRK PRU It was released in November 2020, and make no mistake:It’s happening.The UK Government’s 10-point plan for a new “Green Industrial Revolution.”PriceWaterhouse Coopers believes this trend will cost £400billion……That’s just here in Britain over the next 10 years.Worldwide, the Green Industrial Revolution could be worth TRILLIONS.It’s why I’m urging all investors to read this special presentation carefully, and learn how you can uncover the 5 companies that we believe are poised to profit from this gargantuan trend ahead! See all posts by Harvey Jones Our 5 Top Shares for the New “Green Industrial Revolution” Renowned stock-picker Mark Rogers and his analyst team at The Motley Fool UK have named 6 shares that they believe UK investors should consider buying NOW.So if you’re looking for more stock ideas to try and best position your portfolio today, then it might be a good day for you. Because we’re offering a full 33% off your first year of membership to our flagship share-tipping service, backed by our ‘no quibbles’ 30-day subscription fee refund guarantee.