Poured concrete
A single clean cut, a straightforward header and a solid section that lifts out in one piece.
Cost Guide
Egress Window Cost by Foundation Type
Why a poured-concrete wall, a block wall and an older stone or rubble foundation each price differently for the same size opening.
The single biggest variable in an egress quote, after the well, is what the foundation is made of. The opening is the same size on paper; the work to create it is not.
Planning Ranges by Wall Type
| Foundation | Added difficulty | Effect on a full project |
|---|---|---|
| Poured concrete, 8 to 10 inches | Baseline: clean saw cut, predictable header | Lowest cutting cost; most Lapeer subdivisions from the 1970s on |
| Concrete block | More prep; cores and webs need bracing and a lintel | Usually $300–$800 more than poured for the same opening |
| Poured wall thicker than 10 inches or heavily reinforced | Slower cutting, heavier removed section | $400–$1,000 or more |
| Older stone, brick or rubble foundation | Hand work, custom framing, unpredictable conditions | Quoted after an in-person look; the widest range |
Planning note: These are differences relative to a poured wall, not total project prices. See the installation cost guide for full-project ranges.
Why the Wall Type Matters
Block
Hollow cores and mortar joints mean more bracing, grouting and a proper steel lintel over the opening.
Stone or rubble
No two are alike. The opening is framed to the wall, and hidden voids or prior repairs can change the plan.
The header
Every wall type needs proper support over the new opening; the method and cost differ by material.
How to Read a Quote
A good proposal names your wall type and the cutting method for it. If the estimator has not looked at the actual foundation, treat any firm number as provisional, especially on a home built before 1950.
Foundation Cost FAQs
How do I know what my foundation is?
Poured walls are smooth and continuous. Block walls show a grid of mortar joints. Older homes near downtown Lapeer sometimes have stone or brick below grade.
Is a block wall safe to cut?
Yes, with the right bracing and a lintel. It is routine work; it just takes more preparation than a poured wall.
Will cutting the opening weaken the wall?
A properly sized opening with a correct header preserves the wall capacity. Unusual conditions are reviewed before cutting.
Related Services and Resources
Get Started
Ready for a Real Number?
Every price here is a planning range. Send your address and project details for a scoped estimate.