Going Green on a budget.
It has been a pretty good summer. Lots of projects with a wide variety of budgets, great forward thinking clients and different terroirs.
This small back yard project shown below was planned with a tight budget in mind for a duplex in the city of San Francisco.
Measuring 24 feet wide by 70 feet in length. The back yard sloped 8 feet from top to bottom.
The owners of the building wanted to create two distinct garden areas for each family living in the duplex. They also requested using green index building techniques and they had a very very conservative installation and materials budget .
The first order of business was to clear the site of weeds and debris that was waist high.
While doing so we discovered a series of concrete walls and flooring in various states of erosion .
Landscape archaeology at its funnest.
Next came out my transit and laser so that I could layout the exact locations and elevations of the walls that were going to be salvaged.
To create two separate flat outdoor spaces for the two homeowners a few retaining walls were in order to tame the hillside. We built these out of pressure treated wood.
The top level 12’-6” x 18’-0” will have a surface of artificial turf. This will provide a nice green surface for the kids to play on yet will not require water or mowing to maintain its practicality.
The lower level 16 x14 utilizes permeable pavers as a surface.
We reused, cleaned and resurfaced the existing concrete retaining walls at the stairway.
In some cases we had to cut the concrete and or add a few inches here and there to level and even them out. They were resurfaced with a clean coat of stucco.
The stair treads are permeable pavers and the infill will be stablized decomposed granite.
The planting is drought tolerant for the most part using mostly succulents, a privacy hedge of Pittosporum silver sheen , a couple of Queen palms and a few flowering shrubs such as Tibouchinia and Brugmansia. With less than 250 gallons p/m calculated for the garden , we were able to install only one valve for the entire project.
Mulch, the decomposed granite infill, and the artificial turf will be installed next week.
The whole project has taken about 3 weeks to install and about 20 K in materials and labor.
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