Saving existing concrete can make sense, but lifting is not the right answer to every damaged surface. The condition and the cause matter as much as the height difference.
When lifting deserves a closer look
A slab that has settled while retaining usable concrete may be a candidate for mudjacking. The goal is to move the existing slab toward a practical position rather than demolish and pour a new one. An assessment needs to look at the full surface, neighboring slabs and what is beneath or beside it.
When a new slab may make more sense
Extensive breakup, severe deterioration, an unsuitable slab configuration or a fundamentally different layout may favor replacement. Surface scaling and discoloration are not corrected by raising the slab. A lifting recommendation should explain what the finished surface will still look like, including existing cracks and patches.
Compare equivalent scopes
A lower headline quote is not automatically the better choice if one scope leaves important work unresolved. Compare the proposed outcome, site access, disruption, patching, any separate drainage or joint work and written warranty terms. Do not use a generic online savings percentage as a prediction for your property.
The best answer can be a different referral
If recurring ground movement or structural support is involved, further investigation may be more useful than an immediate lift. Mud Dog Jacking provides mudjacking; a replacement recommendation does not mean a replacement service is being offered through this site. Ask who would perform each part of the recommended work.
For further reading
The Utah Geological Survey's soil and rock hazard guidance describes why ground conditions need care. Its geologic hazard assistance page explains property-specific investigation and professional verification. These resources are not a diagnosis of your property.