Home addition renovation can be a daunting task, but understanding the process from start to finish can make it more manageable. It's essential to start by determining the purpose and scope of the project, which can be influenced by factors such as budget, lifestyle, and personal preferences.
A well-defined project scope can help you avoid costly surprises and ensure that your addition meets your needs. According to the article, a typical home addition project can range from 10% to 50% of the home's total value.
Before breaking ground, it's crucial to obtain necessary permits and approvals from local authorities. This process can take anywhere from a few days to several weeks, depending on the complexity of the project.
A successful home addition renovation requires careful planning, attention to detail, and a clear understanding of the process. By understanding the steps involved and being prepared, you can enjoy a stress-free renovation experience.
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Planning and Preparation
Before you start your home addition renovation, take note of your daily schedule, work routine, and room needs. This will help you decide on a schedule of start and end times that work for you and your family.
To ensure a smooth project, it's common to hire a general contractor who will supervise and pay various specialist subcontractors to complete the project to the agreed-upon specifications. This is a more efficient and less daunting task than planning and supervising the project yourself.
Be prepared for the fact that it takes a long time to build an addition to a house, with actual labor time taking only two to four weeks of eight-hour workdays in the hands of skilled contractors.
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Assess Your Daily Routine and Space Needs
As you start planning your home addition, it's essential to assess your daily routine and space needs. Consider your home's layout and how the addition will impact your daily life.
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Take note of which rooms you use most and at what times, so you can decide which adjustments to make during the remodel. This information will also help you share your schedule with your contractor.
Think about your yard and neighborhood, too - if it's tight, consider building up instead of out. This can be a game-changer for homes with small yards or close neighbors.
Your daily schedule and work routine can also inform your design decisions. For example, if you work from home, you may want to prioritize a dedicated workspace.
Before You Begin
Before you start planning your room addition, it's essential to understand the scope of the project and the resources required. This can be daunting, especially if you're not familiar with the building process.
You'll need to consider the various tools and materials involved, which can range from excavation equipment and concrete tools to stains and varnishes for woodwork and cabinetry. This can be a long list, and it's common for homeowners to underestimate the complexity of the project.
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Few building trade professionals have all the necessary tools and skills to complete a major room addition, so it's not uncommon for a general contractor (GC) to supervise the project. Hiring a general contractor can make the process much smoother, as they'll handle the subcontractors and ensure the project meets the agreed-upon specifications.
Be prepared for the fact that building an addition to a house takes a long time. While the actual labor time may only take two to four weeks, there's often downtime between phases as the project waits for inspectors or the next subcontractor.
Permits and Approvals
Getting the necessary permits and approvals is a crucial step in your home addition renovation project. This process can take anywhere from two to three months, depending on your municipality and the type of construction work.
To start, you'll need to submit an application for building permits, which requires architectural, structural, and building sheet plans, as well as a Certificate of Location and on-demand technical sheets. You'll also need to pay the required fees.
Some municipalities may require structural engineer plans for approval, so be sure to check with your local authorities to confirm their requirements. Once your application is submitted, it's a good idea to follow up with the city to ensure everything is in order.
Here are some documents you may need to secure a building permit:
- 3D concept plans
- Architectural plans
- Structural plans
- Survey plan
- Drawings/photos of external elements (e.g. exterior siding, doors, windows)
- Certificate of location
- Building sheet
- Proof of insurance from the general contractor performing the work
It's also a good idea to understand your municipality's requirements and rules before starting your project. This may involve presenting your project scope and requirements to your municipality's office to determine if a building permit is required.
Meet Municipality Requirements
It's essential to understand your municipality's requirements before embarking on a home addition project.
You can present your project at your municipality's office to find out if it's eligible for construction. A building permit may be required to move forward with the project.
Rules may differ depending on your area and the type of renovations involved. Some areas may require structural engineer plans for approval.
To find out how to obtain a permit, ask your municipality these questions:
- Am I allowed to modify my home as defined by my project scope?
- How much time is required to get a building permit for this type of project?
- What documents will I need to secure the building permit?
Here are some documents that may be required when applying for a building permit:
- 3D concept plans
- Architectural plans
- Structural plans
- Survey plan
- Drawings/photos of external elements (e.g. exterior siding, doors, windows)
- Certificate of location
- Building sheet
- Proof of insurance from the general contractor performing the work
In some cases, you may need to revise your project scope to get approval for a permit. Building height restrictions, for example, might require you to build the extension sideways instead of upwards.
Approve Construction Work
The final approval of your construction work is a crucial step in wrapping up your home addition project. This process typically involves two stages: the deficiency visit and the transfer of responsibility.
You'll need to visit the construction site with the general contractor to identify any irregularities and uncompleted work, which they'll document for future reference.
The contractor's role is to note and document all the deficiencies that have been found on work that they were responsible for. This ensures that everything is completed to a satisfactory standard.
Once all deficiencies have been corrected, you can take possession of your new home addition. This is the moment when responsibility for the premises transfers from the general contractor to you, the homeowner.
Don't forget to call your insurer to update your home insurance and add the new extension, as it was previously covered by the general contractor's insurer.
Hiring and Managing Contractors
Before hiring a contractor, make sure they have a valid license and liability insurance with a minimum coverage of $2,000,000 to protect your property and neighbors during construction. This is crucial to avoid any potential risks or damages.
To find a reputable contractor, start by asking for recommendations from your network and interview at least three contractors. Check their project portfolio to get a sense of their experience and ensure they are fully licensed and bonded.
When evaluating contractors, consider their availability to start work and verify payment terms to avoid any misunderstandings. A contractor's experience and reputation can make all the difference in the success of your home addition renovation.
Here are some key things to look for in a contractor:
- Valid license and liability insurance
- Project portfolio with relevant experience
- Availability to start work
- Clear payment terms
Remember, hiring a contractor can be expensive, with costs ranging from 10% to 20% of the entire project. However, it's often worth the investment to ensure the work is done correctly and on time.
5. Hire a Structural Engineer
Hire a structural engineer to design and size structural elements of your home addition, such as foundation, concrete slab, load-bearing walls, columns and beams, and lintels above doors and windows. These plans give precise information to the general contractor on how to build the parts of your home addition that holds it up.
According to the Law on Engineers, an engineer's input is mandatory for any construction work related to a building's structure. This is why it's crucial to hire an independent structural engineer to avoid potential conflicts of interest.
A contractor needs an engineer's recommendations on structural work before being able to provide you with final quotes. You can also ask your general contractor for a recommendation, but consider hiring an independent structural engineer for unbiased advice.
A standard home addition project typically requires both an architect and a structural engineer. For a project with a budget of $100,000, an architect and a structural engineer will be involved.
Here's a list of professionals you may need to work with for your home addition project:
- Architect (or architectural technologist)
- Interior designer
- Engineer
- Municipality
- Insurer
- General contractor and their subcontractors
- Material suppliers
Hire a Professional
Hiring a professional contractor can be a daunting task, but it's essential to get it right to avoid costly mistakes and delays.
You'll need to decide whether to DIY or hire a contractor, and most people will benefit from hiring a professional. A licensed contractor can handle the project from beginning to end and ensure you have the necessary permits.
A contractor's cost is a significant factor, with most charging 10% to 20% of the entire project. Getting bids from multiple contractors will help you find a qualified contractor at the right price.
To find a reputable contractor, start by coming up with a detailed plan for your project. This will help you communicate your needs clearly and get accurate bids. You should also familiarize yourself with the current cost of labor and materials.
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You can check with your network and ask for recommendations for local contractors. It's a good idea to interview at least three contractors and ask each person for references from previous jobs they've completed.
Before hiring a contractor, ensure they are fully licensed and bonded. Each state has different licensing requirements, so find out what they are where you live.
Here are some essential things to check when hiring a contractor:
- Valid license and liability insurance (minimum $2,000,000)
- Project portfolio to assess their experience
- Availability to start work
- Payment terms
A contractor's contract should outline the scope of work, payment schedule, and materials. It should also include a termination clause that protects everyone involved.
Design and Budgeting
Defining your project's scope of work is a crucial step in planning your home addition. This involves describing the problem you plan to solve and understanding your current situation.
To get started, ask yourself questions like "What type of home addition do I want?" and "What is my budget and timeline?" A clear direction for your project will help ensure its success.
Use a preliminary document to describe your project to a building expert, including your vision, goals, and requirements. This will help you stay on track and make informed decisions throughout the process.
Here are some key questions to consider:
- What type of home addition do I want?
- What is the total surface area of the home addition?
- How many floors are there?
- How many and what types of rooms do I want to add (kitchen, bedroom, bathroom)?
- Will I need a centralized HVAC system?
- What is my budget and timeline?
- When should the work start and be completed?
- What do I want the home addition to look like?
Define Project Scope
Defining your project scope is a crucial step in planning your home addition. It's the most important step, in fact, and it requires a lot of work and time, but it's worth it to ensure the success of your project.
To establish a clear direction for your home addition, start by describing the problem you plan to solve. Take the time to understand your current situation and research what you want out of your renovations. It's essential to know what type of home addition you want, including the total surface area, number of floors, and types of rooms you want to add.
Here are some questions to ask yourself to get started:
- What type of home addition do I want?
- What is the total surface area of the home addition?
- How many floors are there?
- How many and what types of rooms do I want to add (kitchen, bedroom, bathroom)?
- Will I need a centralized HVAC system?
- What is my budget and timeline?
- When should the work start and be completed?
- What do I want the home addition to look like?
Remember, your project scope should include your vision, goals, and requirements. Use a preliminary document to describe your project to a building expert, such as an architect, engineer, or interior designer. This will help ensure that your project is feasible and meets all the necessary requirements.
Hire an Architect
Hiring an architect is a crucial step in the design and budgeting process for your home addition or remodeling project. They'll work with you to understand your vision and preferences.
Architects will provide guidance and bring your vision to life by creating a series of plans for various stages of your project. These plans will help you visualize your space and make informed decisions about your renovation.
You can expect your architect to create the following plans:
- Sketches: Drawings outlining the layout of the space to be renovated
- Preliminary plans: Plans used to obtain a building permit
- Construction plans: Plans explaining the work that needs to be done
- Demolition plans (if necessary): Plans showcasing elements that need to be taken out
Construction plans are important for describing the work that needs to be done during your renovation, allowing contractors and suppliers to estimate costs and build quotes. They can also be presented as a legal document for designs that need to be approved by a designated professional.
[Cost]
The cost of a home addition can be a significant factor in your decision-making process.
You should expect to pay between $4,500 and $150,000 for a home addition, with costs varying greatly depending on your location.
The cost will also depend on the type of addition you're building, its size, and the materials used.
A bigger home addition will cost more, and you may need to pay for additional features like laying a new foundation, adding more insulation, and new electrical wiring.
Unless you're capable of tackling the project on your own, you'll need to pay for labor costs, including hiring a carpenter, electrician, and plumber.
You may also need to obtain a permit to ensure all building codes are met, which can cost between $460 and $2,770.
It's easy to underestimate the costs of a home addition, so it's essential to come up with a renovation budget before starting your project.
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Space Requirements
Considering your home's space requirements is crucial when planning a home addition. Your home's shape and size will dictate how you can build out or up.
Defining your project's scope of work should include determining the total surface area of the home addition. This will help you understand the scale of your project.
To establish a clear direction for your home addition, research what you want out of your renovations. Take note of what rooms you use most and at what times so you know which adjustments you'll have to make during the remodel.
The type of home addition you want will also impact your space requirements. Consider whether you want to build out or up, especially if your yard is tight or your neighbors are close.
Here are some questions to ask yourself when considering your home's space requirements:
- What is the total surface area of the home addition?
- How many floors are there?
- Will I need a centralized HVAC system?
Your answers to these questions will help you determine the space requirements for your home addition.
Kitchen
A kitchen addition can be a great way to increase your home's value, with one of the highest returns on investment. This is because a kitchen is often a major selling point for home buyers, and upgrading it can make a big difference in their decision to purchase.
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If you're considering a kitchen addition, be prepared for a high price tag, ranging from $5,000 to $125,000 with an average cost of $65,000. This is due to the complex electrical and plumbing requirements involved.
Adding more square footage and upgrading appliances, stone countertops, and cabinets can make a big impact, but it's essential to weigh the costs against the potential benefits.
Dormer
A dormer is a roofed structure with a window, allowing for more light on the top floor. It's a great way to add curb appeal and natural light to your home.
Typically, a dormer costs between $2,500 and $30,000, with the price varying depending on its size.
Frequently Asked Questions
Is it cheaper to build a house or add an addition?
Building an addition to your existing home is often cheaper than buying or building a new home with the same space. This is due to lower closing costs and no need to sell your current property.
How much does it cost to add 1000 square feet to a house?
The cost to add 1000 square feet to a house typically ranges from $125,000 to $250,000, depending on materials and finishes chosen. Basic materials keep costs lower, while high-end finishes can drive up the price.
What is the most expensive part of the home addition?
The most expensive part of a home addition is typically the kitchen or bathroom, due to extensive plumbing, electrical work, and high-end finishes. Costs for these rooms can range from $11,000 to $16,000 or more.
Sources
- https://billdr.co/guides/home-renovation/home-extension-step-by-step
- https://www.rockethomes.com/blog/homeowner-tips/adding-an-addition-to-a-house
- https://factordesignbuild.com/blog/tips-for-planning-a-home-addition-or-remodel/
- https://www.forbes.com/home-improvement/article/types-of-house-additions/
- https://www.thespruce.com/how-to-build-an-addition-1821283
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