Adding an Accessory Dwelling Unit (ADU) to your property in St. Petersburg is an excellent way to create additional space for recreation, accommodate family members, rental opportunities, or enhance your property’s value. However, before construction begins, homeowners must go through the pre-construction phase, where key decisions about design, permits, budgeting, and contractor selection take place.
At CASK Construction, we specialize in guiding homeowners through this critical phase, ensuring a seamless and stress-free process. This guide breaks down what to expect before breaking ground, including essential milestones, St. Pete’s permitting process, and how our team ensures efficiency at every step.
Why the Pre-Construction Phase Matters
The pre-construction phase is more than just paperwork—it lays the foundation for a successful and cost-effective ADU project. Proper planning can:
- Save time by addressing design and permit challenges early
- Prevent budget overruns through detailed cost estimates
- Ensure compliance with St. Pete zoning and building codes
- Help homeowners make informed decisions about layouts, materials, and financing
At CASK Construction, our pre-construction process takes approximately 4-6 months, covering:
- Pre-Design & Floor Plan Development
- Permit Management & Approvals
- Bid Management
- Material Selections & Final Budgeting
Below, we outline each stage of the process in detail.
Step 1: Pre-Design & Initial Planning (20-25 Days)
The first step of the ADU journey is pre-design, where we define the project scope, budget, and initial layout.
Key steps in this phase:
- Signing the Pre-Construction Agreement – This formalizes our role in guiding your project
- Internal & External Sales-to-Pre-Construction Transition – Ensuring seamless project handoff between teams
- Budget Update & Initial Floor Plan Drafting – Beginning cost estimates based on 50% completed drawings
- Site Survey Review – Assessing property conditions for zoning and structural feasibility
Homeowner Tip: Clarifying how you plan to use your ADU (recreation space, guest suite, rental, office, etc.) at this stage helps streamline design choices and avoid costly changes later.
Step 2: Floor Plan Development (50%-75%-95%)
Over the next 60-100 days, our team works with you to refine the floor plans at three key milestones.
50% Floor Plans
- Reviewing property details, plumbing locations, and zoning feasibility
- Receiving the initial floor plan draft from the designer
- Budget updates based on preliminary plans
75% Floor Plans
- Refining layouts and selecting design elements
- Conducting internal reviews to finalize structural details
95% Floor Plans
- Homeowner approval of the final layout
- Energy calculations and compliance checks
- Preparing the construction-ready floor plans
Homeowner Tip: Making design decisions early helps avoid timeline delays and extra costs from last-minute changes. You will not be rushed during this process and will have full control of design changes that align with the vision of your space.
Step 3: Permit Management (60-120 Days)
Navigating St. Pete’s permit and zoning process is one of the most time-consuming aspects of pre-construction. Fortunately, CASK Construction handles all permit submissions on your behalf, while checking in daily for city comments and updates regarding your permitting progress.
What to Expect:
- Permit Set Submission – We submit your plans to the city’s permit office
- City Review & First Request for Comments – The city may require revisions before approval
- Correction Handling & Resubmission – We address comments and submit corrections as needed, while keeping you updated regarding city requests and comments
- Final Approval & Notice of Commencement – Once approved, mobilization and construction contract are issued, concluding your pre-construction journey
Estimated Permit Timelines:
On average, ADU permitting can range from 60 – 120 days. Actual time dependent on factors such as city responsiveness, project scope (flood, historic, demo, etc), environmental challenges (storms), and time allowed for responding to City comments.
Step 4: Bid Management (30-40 Days)
While permits are being processed, we initiate the subcontractor selection process to help finalize construction costs.
Key steps include:
- Sending bid packages to our vetted and close network of subcontractors
- Refining project costs based on appropriate subcontractor quotes
- Budget updates leading up to this stage is based on overall size of ADU, design choices, building materials preferences, city comments and engineering requirements
Step 5: Material Selections (20-30 Days, Concurrent with Permitting)
This phase focuses on choosing the interior selections that define your ADU’s style and functionality.
- Meeting 1: Initial selections (cabinets, flooring, fixtures, etc.)
- Meeting 2: Budget adjustments based on selections
- Meeting 3: Final approval and order processing
Start Your ADU Journey with CASK Construction
Planning ahead is key to a successful and stress-free ADU build. With CASK Construction, you’ll have an expert team managing:
- Permit approvals and regulatory compliance
- Budgeting and contractor selection
- Design, materials, and construction planning
For a thorough breakdown of the Pre-Construction Timeline, schedule your free consultation now!
Ready to take the next step? Let us know how we can help and our ADU experts will be in touch with you.
