Ridgeline

Landscape construction · Pittsburgh & the South Hills

The lot everyone else walked away from.

Grading, retaining walls and drainage on steep and difficult sites across Allegheny County — engineered, permitted, and built by one crew.

4.9from 96 reviews
  • PA HIC #118402, licensed & insured
  • Walls over 4ft stamped by a PE
  • Five year structural warranty
430Walls built
19Years in Allegheny County
22ftTallest wall to date
5yrStructural warranty

The part nobody photographs

Same lot.
Eleven weeks.

Every contractor shows you a finished patio. Almost none of them show you the hole it came out of — which is the part you are actually paying for. Drag the handle.

A bare graded back yard with an excavator parked on the cut The finished terrace with a stone kitchen, boulder planting and paving Week 1 Week 11

Upper St. Clair. Nine feet of fall across forty, a spring nobody had mapped, and a garage taking water every year. Two-tier segmental wall, French drain to daylight, terrace on top. The drainage is the job; the paving is the part you see.

Not our words

Ninety-six homeowners,
and one crew.

Two firms quoted the wall and neither mentioned drainage. Ridgeline opened with it and the number was higher because of it. Three winters on there is not a crack in it and the garage is dry for the first time since we bought the house.

Dan WhitakerUpper St. Clair · 4 months ago on Google

They pulled the permit, dealt with the township and sent us the stamped drawing before anyone dug. I have built a house and never had a contractor make that part this painless.

Priya RamanathanFox Chapel · 7 months ago on Google

Access was a nightmare — no gate wide enough for a machine. They hand-carried block down a hillside for two days rather than tell us it could not be done. Came in four days over and on the original number.

Marcus BellMt. Lebanon · 11 months ago on Google

What we do

Ten things.
All of them structural.

We do not mow, we do not plough and we do not take maintenance contracts. If it holds ground up or moves water away, it is ours.

A retaining wall part-built on an overcast day, its base course still open to show the drainage stone and perforated pipe behind the block
Retaining wallsBlock, geogrid, engineered backfill
A tracked excavator cutting a stepped bench into a steep clay slope in hard autumn sunlight, grade stakes and silt fence along the cut
Grading & excavationCut and fill, rough and final grade
Bluestone flags being bedded into screeded sand just after rain, the laid stone dark and wet beside the screed rails
Patios & walkwaysOn a proper base, over a proper sub-grade
A flight of quarried sandstone slab treads climbing a fern bank, autumn leaves lying across them
Steps & stone stairsCut into the grade, not bolted on
Engineered walls over 4ft, PE-stamped
Drainage and French drains to daylight
Slope stabilisation and erosion control
Driveways and parking pads on grade
Pool terracing and surrounds
Site work and excavation for additions

Recent work

Built into the hillside.

Every one of these was a slope before we started. The photographs are taken at least two winters after handover, because a wall that looks good in October tells you nothing.

Three terraces of block retaining wall below a white clapboard house, the planting on them now fully grown in
Three-tier cut and fillSewickley · 2022
A long block retaining wall curving away beside a driveway in winter, bare trees behind it
210ft of segmental wallPeters Township · 2021
A long flight of stone steps running down a steep front lawn to the street in low evening sunlight
Stair run, 34 risersMt. Lebanon · 2023
A stone terrace carried on a boulder-faced retaining wall above a grass bank on a bright spring day
Terrace over a filled bankFox Chapel · 2023

How it runs

Four stages. You see
the engineering first.

01

Site visit

We read the slope, the soil and where the water already goes. Ninety minutes on your property, free, and you get an honest answer on whether it needs engineering.

02

Engineering & permit

Anything over four feet gets a design stamped by a professional engineer. We prepare the packet and file it with the township ourselves.

03

Excavate & build

Cut, compacted base, drainage stone, pipe to daylight, block, geogrid, backfill. The half you never see is the half that decides whether it stands.

04

Grade, plant, test

Final grade, topsoil and planting — then we run water through the drainage with you standing there before the machines leave.

A wall does not fail because of the block.
It fails because of the water.

Why us and not the cheaper number

Four differences you can
check before you sign.

01

Drainage is priced first, not last

Pipe, stone and outfall are line one of the estimate. When a quote comes in twenty thousand under ours, this is almost always the difference.

02

We stamp what has to be stamped

Over four feet, Pennsylvania wants an engineer. Plenty of firms build to three-foot-eleven and call it done. We will tell you which one you actually need.

03

One crew, no subcontractors

The people who dig it are the people who build it and the people who come back. Nobody hands your site to a company you have never met.

04

Five year structural warranty

In the contract, not in the sales conversation. We also come back at two years to look at it whether you call us or not.

Where we work

Allegheny County
and one ring out.

One crew, one region. We do not take work we cannot reach with a machine before seven in the morning, because a wall goes wrong in the hours nobody is watching.

PittsburghMt. LebanonUpper St. Clair Bethel ParkPeters TownshipSewickley Fox ChapelWexfordCranberry RobinsonMoonShaler

Not listed? Call anyway — if it is inside forty minutes of Carnegie the answer is usually yes.

Houses stepping down a steep wooded hillside above a river valley in autumn colour

The questions we actually get

Six honest answers.

Around $38 to $70 per square face foot in this market, depending on access, whether it needs engineering and what the drainage has to do. A typical two-tier residential wall runs $22,000 to $60,000. You get a per-line price before anything is committed.

In most Allegheny County municipalities, yes, over four feet — and some want one over three. We check your township, prepare the packet and file it. It is not an extra line on the invoice.

Water, nearly every time. Saturated backfill weighs roughly twice what drained backfill weighs, and the wall was designed for the drained number. Almost every failure we are called to repair has no drainage stone and no pipe behind it.

A straightforward wall is one to two weeks on site. Add two to six weeks ahead of that if it needs engineering and a permit. Anything with a terrace on top is usually eight to twelve weeks start to finish.

Usually. We run a compact track loader that fits through a 36‑inch gate, and where nothing fits we have carried block by hand. It costs more and we will say so at the site visit rather than at invoice.

Five years on the structure — movement, separation, failure of the drainage we installed. Settling of planting beds and efflorescence on block are normal and are not defects; we explain which is which at handover rather than argue about it later.

Free site visit

Tell us what
the hill is doing.

Ninety minutes on site, no charge, and a straight answer on whether it needs engineering before anybody talks about price.

(412) 555-0163

Monday to Friday, 6.30am–5pm
Saturday mornings, March to November

Site visit requestNo. RL‑0000

We will never pass your details to anybody else.

Booked.

We will call the number you gave to fix a time. If it is urgent — a wall that has moved since the last rain — ring (412) 555-0163 and say so.