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Homebuilding and construction stocks and ETFs have been in focus in the aftermath of Hurricanes Harvey and Irma. They are expected to benefit from substantial rebuilding work required in areas affected by these massive storms.

Homebuilding ETFs have done pretty well this year as the housing market got a boost from improving jobs market, rising wages and low-interest rates.

There are three ETF focused on homebuilding and construction, and while their names may sound similar, they are actually quite different from one another.

iShares Dow Jones US Home Construction ETF (ITB - Free Report)

ITB, the most popular ETF in the space, is market-cap weighted. About two-thirds of its portfolio is allocated to homebuilders. Top three holdings--DR Horton (DHI - Free Report), Lennar (LEN  - Free Report) and NVR (NVR - Free Report) —account for about one-third of the portfolio.

It has an expense Ratio of 0.44%.

SPDR S&P Homebuilders ETF: (XHB)

XHB is modified equal weighted, selecting its holdings by their market-cap and then equally weighting them in the portfolio.  Homebuilding and Building Products industries get about one-third allocation each in the portfolio.

The fund has an expense ratio of 0.35%.

PowerShares Dynamic Building & Construction Portfolio (PKB - Free Report)

PKB is a smart beta ETF that evaluates companies on a variety of investment merit criteria, including price momentum, earnings momentum, quality and value.

Currently, the portfolio has 27% allocation to Homebuilding, 14% to Construction & Engineering and 13% to Construction Materials.

The product is a bit pricey with an expense ratio of 0.63%.