Background: Degenerative lumbar spinal stenosis is one of the common indications for spine surgery in elderly patients. Because non-operative therapy seldom results in sustained improvement, many patients consider surgery (decompression laminectomy with or without arthrodesis. Increasing pain not relieved by conservative measures forms indication for surgery. Methods: Single centre prospective study was conducted in tertiary care centre in Maharashtra for period of June 2021 to may 2023. 60 patients of age 45 and more with claudication distance <200 m were included and followed up for 1 yr. Patient with previous spine surgery and absent distal pulse were excluded. JOA score was used to assess functional outcome. Baseline details including their demographics, clinical assessment including neurological deficit, MRI lumbar spine, & JOA score for lumbar spine taken. Flexion extension X-ray taken to assess preop instability. Patient followed up at 1, 6 & 12 month and assessed based on JOA score. Result: Significant improvement in JOA score was seen at the end of one year with improvement in walking ability and quality of life. The change in JOA score for patients with pre-operative instability and one’s with symptoms of lesser duration was significantly better. Conclusion: Operative intervention should be expected to give relief of claudication leg pain with significant response to backpain. Most series report a 64% to 91% of improvement, but most patients still have some minor complaints, usually referable to the pre-existing degenerative arthritis of spine. Neurological findings, if present, improve inconsistently.