Businesses particularly along Mort Street are being negatively impacted.

Elouera Street was reopened only recently despite construction work originally slated to be completed in April.

The delays affecting Eloura Street were as a result of "unique conditions not found anywhere else along the light rail corridor", a Transport Canberra spokesman said.

He said lots of existing services meant electric cabling for the light rail had to be installed up to seven meters underground.

"Drilling also progressed slowly due to the presence of large areas of very dense rock," the spokesman said.

The cabling connects to a substation which has taken up roughly half the carpark on the corner of Mort and Eloura Streets.

The spokesman advised during August and September the corner carpark would be closed intermittently while construction of the substation is completed.

About 40 off-street parking spaces and 27 on-street carparks have been lost temporarily. Car spaces where the substation is located will be permanently lost.

Ciao at Mort cafe owner Ab Guleria, whose business directly faces the corner carpark, said construction had impacted trade.

"Our regulars would park the car and walk to work but now they avoid the area because of the [construction] work and traffic," Mr Guleria said.

"They come, they see the [carpark closed] sign and they keep driving."

Mr Guleria said an upside was that the number of construction workers in the area provided a new customer base, but he was concerned what the disruptions might do to his long-term customers.

Owner of neighbouring restaurant Burger Hero, Kuber Sethi said his business had also suffered from the surrounding construction, especially with the removal of car spaces from an area that already had limited parking.

Mr Sethi said he had received complaints from customers about diffculties parking for the last two to three months.

Both business owners said they had received roughly a week's notice of the closure of the carpark but no offers of support from the ACT government.

It comes after Braddon's last car dealership and Next Hair, both on Mort Street, closed earlier in the year with both owners citing a downturn in business due to construction.

A government spokesman said the Canberra Business Chamber was funded to deliver the Light Rail Business Link program to assist businesses along the light rail corridor to mitigate adverse impacts from construction.

Chamber CEO Robyn Hendry said much of that program had involved working with businesses in Gungahlin and Mitchell. She said any business along the light rail corridor was welcome to be a part of the program.

Mrs Hendry said about 520 business owners had attended quarterly forums about light rail.

She said prior to the light rail construction Braddon had been "a victim of its own success" as growing popularity put strain on parking and access.

The amount of private sector development in Braddon meant it was hard to quarantine the negative impacts of light rail construction from other developments, she said.

"If they [businesses] can get through challenges construction is giving them at the moment, it looks very promising," Mrs Hendry said.