(United States). A Landscape Architect earns an average salary of $53,028 per year. The skills that increase pay for this job the most are Project Management and Client Interaction. Experience has a moderate effect on income for this job.Most people with this job move on to other positions after 20 years in this field.United States). A Landscape Architect earns an average salary of $53,028 per year. The skills that increase pay for this job the most are Project Management and Client Interaction. Experience has a moderate effect on income for this job.