Alder & Slate - Bay Area Retaining Walls & Outdoor Construction
Beautiful outdoor living space with professional hardscaping and landscaping

Create Your
Dream Oasis

Transform your backyard into a stunning outdoor oasis with engineering-backed construction. Specializing in retaining walls, patios, and outdoor living spaces. We handle permits, engineering, and construction—you just enjoy the results.

Licensed & Insured
2-Year Warranty
Engineering Backed
Beautiful outdoor living space with professional hardscaping and landscaping

Comprehensive Outdoor
Construction Solutions

Professional segmental retaining wall construction with natural stone01

Retaining Wall Systems

Beautiful and functional walls that transform slopes and define spaces in your landscape.
  • Segmental retaining walls
  • Natural stone walls
  • Terraced hillside systems
Premium outdoor kitchen with natural stone construction and fire features02

Hardscape Construction

Premium patios & outdoor living spaces built for lasting beauty.
  • Natural stone patios
  • Outdoor kitchens & BBQs
  • Fire features & pits
Professional landscape design consultation with detailed planning and visualization03

Custom Design & Planning

Transform your vision into reality with professional design and seamless project planning.
  • 3D design visualization
  • Site planning & layout
  • Permit-ready documentation

Inspirational Spaces
Modern Outdoor Living

Stunning multi-level outdoor living space with integrated retaining walls and professional landscaping

Multi-Tier Hillside Engineering

Oakland Hills

Luxury outdoor kitchen with premium stone work and built-in grilling station

Outdoor Kitchen

Danville

Beautiful natural stone patio with integrated fire pit and ambient lighting

Stone Walkway

Lafayette

Modern engineered retaining wall with natural stone facing and integrated drainage

Retaining Wall

Orinda

Systematic Approach
Exceptional Results

Consultation

We start with a free consultation at your property to understand your vision and provide honest guidance on budget and timeline.

01

Design & Planning

We handle all the technical details - from detailed drawings to permits and engineering - so you can relax knowing everything is done right.

02

Construction

Our experienced crew builds your project with care and attention to detail, keeping you informed every step of the way.

03

Completion

We walk through your completed project together to ensure you absolutely love the results and give you everything you need to maintain it.

04

Bring Your Outdoor Vision to Life

From design to build — we create premium outdoor spaces with craftsmanship, clear communication, and care.

Civil Engineering Expertise
Backed by engineering and project management experience.
Licensed, Insured & Hands-On
We're a local team committed to doing it right the first time.
Client-First Approach
Excellent communication and follow-through on every project.
No obligation • Free site assessment • Same-week appointments available
Alder & Slate – Premium Bay Area Retaining Walls & Outdoor Construction