Northridge, CA paver questions, answered

No neutral source publishes installed patio prices for Northridge, so this site does not print one; the contractor measures and prices it in writing. On a 20 by 20 patio the paver line, the pattern, the border and any seat wall decide it. A plain square in a standard concrete paver sits at the low end, while a tumbled stone with a contrasting border and a seat wall pushes toward the top.

It is priced per job after the contractor measures, not from a chart. That size comes up often in Northridge because the postwar ranch lots are large, and a driveway plus a connecting walkway can reach four figures of square footage before anyone touches the backyard. On a job that big the base depth, the old slab removal and the pattern move the total more than the paver does.

A small patio carries a higher effective rate than a big one, because delivery, mobilization, and equipment setup cost the same whatever the size, so the fixed cost spreads over less area. The contractor prices it in writing after seeing it.

You can, and it will move. Bare Northridge soil is fine alluvial material that compacts unevenly and carries no load, so pavers set straight onto it settle into ruts, spread at the edges, and grow weeds through the joints within a season or two. The compacted aggregate base is what carries the weight and holds the surface flat, and there is no version of the job that works without it.

Concrete is cheaper on day one. Pavers win on everything after that. A slab is one rigid plate that relieves ground movement by cracking, and a patch never matches. A paver field absorbs movement in its sand joints, and a settled section is repaired by lifting the units, correcting the bedding, and putting the same stone back. On the alluvial fan that gave the 1994 earthquake its name, that difference is not theoretical.

There is no single expiry date. A paver surface on a properly compacted base lasts for decades, and nothing wears out all at once, which is the real advantage. Joint sand gets topped up, an individual stained or damaged unit gets swapped, and a settled area gets reset. A poured slab that cracks has no such fix, only a patch or a replacement.

Days rather than weeks on a typical residential job, and the contractor puts the schedule in writing. Removing an old slab comes first, then base excavation and compaction, and laying, cutting, edging, and joint sand close it out. Large driveways, curved layouts, or pool deck cut work extend that.

Northridge is inside the City of Los Angeles, so LADBS rules apply. The city building code exempts walks and driveways not more than 30 inches above grade from a building permit (LAMC 91.106.2), and zoning limits still apply. Work in the public right of way, meaning the apron and the sidewalk crossing at the curb, needs a separate Bureau of Engineering permit, and that gets flagged in your quote before the job starts.

It can, and it is easy to overlook in the north Valley. Northridge sits on a gently sloping alluvial fan with almost no usable relief at the scale of one property, so water will not leave on its own. The fall gets cut into the base by hand, and where the ground cannot fall 6 inches in the first 10 feet, California Residential Code section R401.3 asks for at least 2 percent of slope on hard surfaces within 10 feet of the foundation. Where a yard is boxed in with nowhere to shed, a channel drain or a permeable build does the job that gravity cannot.