Retaining walls in Greenwich, CT
Block and poured concrete walls in Cos Cob, Riverside, Old Greenwich and Byram and the rest of Greenwich. Free estimate, and a straight answer on whether your wall needs an engineer.
- Free on-site estimate anywhere in Greenwich
- Drainage stone and pipe behind every wall
- Poured walls on footings below frost
Retaining walls on Greenwich lots
Half of Greenwich's homes were built before 1963, and the landscape walls that went in with them, often timber or unreinforced block, are reaching the end of their life. Greenwich mixes single-family homes (63%) with multi-family lots, so walls here range from garden terraces to walls holding up shared driveways.
Near Long Island Sound, walls deal with sandy soils, and waterfront structures need state coastal approvals, so our shoreline work stays on the landward side: garden, terrace and driveway walls. Ledge and boulders show up in a lot of Greenwich wall excavations. Sometimes the rock becomes part of the design; sometimes it has to go. We sort that out at the estimate.
The median home in Greenwich was built in 1963, close to the 1960s house that's typical statewide. That's newer than next-door Darien (median 1957) and older than Stamford (1972).
Greenwich at a glance
| Median year homes were built | 1963 |
|---|---|
| Homes built before 1960 | 47% |
| Single-family detached homes | 63% |
| Owner-occupied homes | 69% |
| Population, 2024 estimate | 64,594 |
Wall rules in Greenwich. Under the Connecticut State Building Code, a retaining wall over 4 feet tall, measured from the bottom of the footing, or one carrying a driveway, slope or building above it, needs a permit and generally an engineered design. Work near wetlands or watercourses can also need a sign-off from Greenwich's inland wetlands commission. We check both before we price.
What we do in Greenwich
- Segmental block walls
- Terraces and garden walls with drainage built in.
- Poured concrete walls
- Reinforced walls on footings below frost.
- Engineered walls
- Walls over 4 feet or carrying a driveway or slope.
- Wall replacement
- Leaning or failed walls rebuilt with drainage.
- Steps through walls
- Stairs built into terraces and slopes.
- A
- Poured, reinforced wall (or segmental block)
- B
- Footing below the 42 in. frost line for poured walls
- C
- 12 in. of clean drainage stone
- D
- Filter fabric against the soil
- E
- Perforated pipe to daylight
- F
- Over 4 ft, footing bottom to top, needs an engineered design
Planning prices
| Work | Planning range | What drives it |
|---|---|---|
| Segmental concrete block wall | $40–$80 / face sq ft | Includes base, drainage stone and pipe |
| Poured concrete retaining wall | $60–$120 / face sq ft | Footing, rebar, forms and drainage |
| Garden or terrace walls under 3 ft | $3,000–$9,000 | Typical backyard runs |
Planning ranges for Connecticut in 2026, not quotes. Ledge, tight access, long pump or wheelbarrow runs and very small pours push a job up. Your price comes in writing after we've seen the site. See every line item.
Retaining walls in Greenwich: questions
Do I need a permit for a retaining wall in Greenwich?
Walls over 4 feet from the bottom of the footing, or walls holding up a driveway, slope or building, need a permit from Greenwich's building department and generally an engineer's design. Shorter garden walls usually don't, though zoning setbacks and wetlands rules can still apply.
How much does a retaining wall cost in Greenwich?
Block walls fall in our planning range of $40–$80 / face sq ft of wall face, poured concrete walls $60–$120 / face sq ft. Height, drainage, access and any engineering set the final number.
What if there's ledge where the wall goes?
Ledge can be the best base there is. We clean it, step the footing or base to the rock, and make sure water can drain off it.
Do you build retaining walls near Greenwich?
Yes. We also build retaining walls in Stamford, Darien and New Canaan, and across Fairfield County.
More concrete work in Greenwich
Everything else we build in town. Descriptions of each are on the Greenwich concrete contractors page.
Retaining walls near Greenwich
Same service, neighboring towns. All 67 towns.
- Stamford5 mi
- Darien8 mi
- New Canaan11 mi
- Norwalk12 mi
- Wilton15 mi
- Westport16 mi
- Weston19 mi
- Ridgefield20 mi
- Fairfield21 mi
- Bridgeport25 mi
- Danbury26 mi
- Bethel26 mi
Free estimates in Greenwich
Call or send the estimate ticket. We set a time to see the site and put the price in writing.